drivers/infiniband/core/uverbs_cmd.c

   1 /*
   2  * Copyright (c) 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005, 2006, 2007 Cisco Systems.  All rights reserved.
   4  * Copyright (c) 2005 PathScale, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Mellanox Technologies.  All rights reserved.
   6  *
   7  * This software is available to you under a choice of one of two
   8  * licenses.  You may choose to be licensed under the terms of the GNU
   9  * General Public License (GPL) Version 2, available from the file
  10  * COPYING in the main directory of this source tree, or the
  11  * OpenIB.org BSD license below:
  12  *
  13  *     Redistribution and use in source and binary forms, with or
  14  *     without modification, are permitted provided that the following
  15  *     conditions are met:
  16  *
  17  *      - Redistributions of source code must retain the above
  18  *        copyright notice, this list of conditions and the following
  19  *        disclaimer.
  20  *
  21  *      - Redistributions in binary form must reproduce the above
  22  *        copyright notice, this list of conditions and the following
  23  *        disclaimer in the documentation and/or other materials
  24  *        provided with the distribution.
  25  *
  26  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  30  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  31  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  32  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  33  * SOFTWARE.
  34  */
  35
  36 #include <linux/file.h>
  37 #include <linux/fs.h>
  38 #include <linux/slab.h>
  39 #include <linux/sched.h>
  40
  41 #include <linux/uaccess.h>
  42
  43 #include <rdma/uverbs_types.h>
  44 #include <rdma/uverbs_std_types.h>
  45 #include "rdma_core.h"
  46
  47 #include "uverbs.h"
  48 #include "core_priv.h"
  49
  50 /*
  51  * Copy a response to userspace. If the provided 'resp' is larger than the
  52  * user buffer it is silently truncated. If the user provided a larger buffer
  53  * then the trailing portion is zero filled.
  54  *
  55  * These semantics are intended to support future extension of the output
  56  * structures.
  57  */
  58 static int uverbs_response(struct uverbs_attr_bundle *attrs, const void *resp,
  59                            size_t resp_len)
  60 {
  61         int ret;
  62
  63         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
  64                 return uverbs_copy_to_struct_or_zero(
  65                         attrs, UVERBS_ATTR_CORE_OUT, resp, resp_len);
  66
  67         if (copy_to_user(attrs->ucore.outbuf, resp,
  68                          min(attrs->ucore.outlen, resp_len)))
  69                 return -EFAULT;
  70
  71         if (resp_len < attrs->ucore.outlen) {
  72                 /*
  73                  * Zero fill any extra memory that user
  74                  * space might have provided.
  75                  */
  76                 ret = clear_user(attrs->ucore.outbuf + resp_len,
  77                                  attrs->ucore.outlen - resp_len);
  78                 if (ret)
  79                         return -EFAULT;
  80         }
  81
  82         return 0;
  83 }
  84
  85 /*
  86  * Copy a request from userspace. If the provided 'req' is larger than the
  87  * user buffer then the user buffer is zero extended into the 'req'. If 'req'
  88  * is smaller than the user buffer then the uncopied bytes in the user buffer
  89  * must be zero.
  90  */
  91 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
  92                           size_t req_len)
  93 {
  94         if (copy_from_user(req, attrs->ucore.inbuf,
  95                            min(attrs->ucore.inlen, req_len)))
  96                 return -EFAULT;
  97
  98         if (attrs->ucore.inlen < req_len) {
  99                 memset(req + attrs->ucore.inlen, 0,
 100                        req_len - attrs->ucore.inlen);
 101         } else if (attrs->ucore.inlen > req_len) {
 102                 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
 103                                           attrs->ucore.inlen - req_len))
 104                         return -EOPNOTSUPP;
 105         }
 106         return 0;
 107 }
 108
 109 /*
 110  * Generate the value for the 'response_length' protocol used by write_ex.
 111  * This is the number of bytes the kernel actually wrote. Userspace can use
 112  * this to detect what structure members in the response the kernel
 113  * understood.
 114  */
 115 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
 116                                   size_t resp_len)
 117 {
 118         return min_t(size_t, attrs->ucore.outlen, resp_len);
 119 }
 120
 121 /*
 122  * The iterator version of the request interface is for handlers that need to
 123  * step over a flex array at the end of a command header.
 124  */
 125 struct uverbs_req_iter {
 126         const void __user *cur;
 127         const void __user *end;
 128 };
 129
 130 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
 131                                 struct uverbs_req_iter *iter,
 132                                 void *req,
 133                                 size_t req_len)
 134 {
 135         if (attrs->ucore.inlen < req_len)
 136                 return -ENOSPC;
 137
 138         if (copy_from_user(req, attrs->ucore.inbuf, req_len))
 139                 return -EFAULT;
 140
 141         iter->cur = attrs->ucore.inbuf + req_len;
 142         iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
 143         return 0;
 144 }
 145
 146 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
 147                                size_t len)
 148 {
 149         if (iter->cur + len > iter->end)
 150                 return -ENOSPC;
 151
 152         if (copy_from_user(val, iter->cur, len))
 153                 return -EFAULT;
 154
 155         iter->cur += len;
 156         return 0;
 157 }
 158
 159 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
 160                                                   size_t len)
 161 {
 162         const void __user *res = iter->cur;
 163
 164         if (iter->cur + len > iter->end)
 165                 return (void __force __user *)ERR_PTR(-ENOSPC);
 166         iter->cur += len;
 167         return res;
 168 }
 169
 170 static int uverbs_request_finish(struct uverbs_req_iter *iter)
 171 {
 172         if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
 173                 return -EOPNOTSUPP;
 174         return 0;
 175 }
 176
 177 /*
 178  * When calling a destroy function during an error unwind we need to pass in
 179  * the udata that is sanitized of all user arguments. Ie from the driver
 180  * perspective it looks like no udata was passed.
 181  */
 182 struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs)
 183 {
 184         attrs->driver_udata = (struct ib_udata){};
 185         return &attrs->driver_udata;
 186 }
 187
 188 static struct ib_uverbs_completion_event_file *
 189 _ib_uverbs_lookup_comp_file(s32 fd, struct uverbs_attr_bundle *attrs)
 190 {
 191         struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
 192                                                fd, attrs);
 193
 194         if (IS_ERR(uobj))
 195                 return (void *)uobj;
 196
 197         uverbs_uobject_get(uobj);
 198         uobj_put_read(uobj);
 199
 200         return container_of(uobj, struct ib_uverbs_completion_event_file,
 201                             uobj);
 202 }
 203 #define ib_uverbs_lookup_comp_file(_fd, _ufile)                                \
 204         _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
 205
 206 int ib_alloc_ucontext(struct uverbs_attr_bundle *attrs)
 207 {
 208         struct ib_uverbs_file *ufile = attrs->ufile;
 209         struct ib_ucontext *ucontext;
 210         struct ib_device *ib_dev;
 211
 212         ib_dev = srcu_dereference(ufile->device->ib_dev,
 213                                   &ufile->device->disassociate_srcu);
 214         if (!ib_dev)
 215                 return -EIO;
 216
 217         ucontext = rdma_zalloc_drv_obj(ib_dev, ib_ucontext);
 218         if (!ucontext)
 219                 return -ENOMEM;
 220
 221         ucontext->device = ib_dev;
 222         ucontext->ufile = ufile;
 223         xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
 224
 225         rdma_restrack_new(&ucontext->res, RDMA_RESTRACK_CTX);
 226         rdma_restrack_set_name(&ucontext->res, NULL);
 227         attrs->context = ucontext;
 228         return 0;
 229 }
 230
 231 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
 232 {
 233         struct ib_ucontext *ucontext = attrs->context;
 234         struct ib_uverbs_file *file = attrs->ufile;
 235         int ret;
 236
 237         if (!down_read_trylock(&file->hw_destroy_rwsem))
 238                 return -EIO;
 239         mutex_lock(&file->ucontext_lock);
 240         if (file->ucontext) {
 241                 ret = -EINVAL;
 242                 goto err;
 243         }
 244
 245         ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
 246                                    RDMACG_RESOURCE_HCA_HANDLE);
 247         if (ret)
 248                 goto err;
 249
 250         ret = ucontext->device->ops.alloc_ucontext(ucontext,
 251                                                    &attrs->driver_udata);
 252         if (ret)
 253                 goto err_uncharge;
 254
 255         rdma_restrack_add(&ucontext->res);
 256
 257         /*
 258          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 259          * only after all writes to setup the ucontext have completed
 260          */
 261         smp_store_release(&file->ucontext, ucontext);
 262
 263         mutex_unlock(&file->ucontext_lock);
 264         up_read(&file->hw_destroy_rwsem);
 265         return 0;
 266
 267 err_uncharge:
 268         ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
 269                            RDMACG_RESOURCE_HCA_HANDLE);
 270 err:
 271         mutex_unlock(&file->ucontext_lock);
 272         up_read(&file->hw_destroy_rwsem);
 273         return ret;
 274 }
 275
 276 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 277 {
 278         struct ib_uverbs_get_context_resp resp;
 279         struct ib_uverbs_get_context cmd;
 280         struct ib_device *ib_dev;
 281         struct ib_uobject *uobj;
 282         int ret;
 283
 284         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 285         if (ret)
 286                 return ret;
 287
 288         ret = ib_alloc_ucontext(attrs);
 289         if (ret)
 290                 return ret;
 291
 292         uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
 293         if (IS_ERR(uobj)) {
 294                 ret = PTR_ERR(uobj);
 295                 goto err_ucontext;
 296         }
 297
 298         resp = (struct ib_uverbs_get_context_resp){
 299                 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
 300                 .async_fd = uobj->id,
 301         };
 302         ret = uverbs_response(attrs, &resp, sizeof(resp));
 303         if (ret)
 304                 goto err_uobj;
 305
 306         ret = ib_init_ucontext(attrs);
 307         if (ret)
 308                 goto err_uobj;
 309
 310         ib_uverbs_init_async_event_file(
 311                 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
 312         rdma_alloc_commit_uobject(uobj, attrs);
 313         return 0;
 314
 315 err_uobj:
 316         rdma_alloc_abort_uobject(uobj, attrs, false);
 317 err_ucontext:
 318         rdma_restrack_put(&attrs->context->res);
 319         kfree(attrs->context);
 320         attrs->context = NULL;
 321         return ret;
 322 }
 323
 324 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 325                                   struct ib_uverbs_query_device_resp *resp,
 326                                   struct ib_device_attr *attr)
 327 {
 328         struct ib_device *ib_dev = ucontext->device;
 329
 330         resp->fw_ver            = attr->fw_ver;
 331         resp->node_guid         = ib_dev->node_guid;
 332         resp->sys_image_guid    = attr->sys_image_guid;
 333         resp->max_mr_size       = attr->max_mr_size;
 334         resp->page_size_cap     = attr->page_size_cap;
 335         resp->vendor_id         = attr->vendor_id;
 336         resp->vendor_part_id    = attr->vendor_part_id;
 337         resp->hw_ver            = attr->hw_ver;
 338         resp->max_qp            = attr->max_qp;
 339         resp->max_qp_wr         = attr->max_qp_wr;
 340         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 341         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 342         resp->max_sge_rd        = attr->max_sge_rd;
 343         resp->max_cq            = attr->max_cq;
 344         resp->max_cqe           = attr->max_cqe;
 345         resp->max_mr            = attr->max_mr;
 346         resp->max_pd            = attr->max_pd;
 347         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 348         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 349         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 350         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 351         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 352         resp->atomic_cap                = attr->atomic_cap;
 353         resp->max_ee                    = attr->max_ee;
 354         resp->max_rdd                   = attr->max_rdd;
 355         resp->max_mw                    = attr->max_mw;
 356         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 357         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 358         resp->max_mcast_grp             = attr->max_mcast_grp;
 359         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 360         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 361         resp->max_ah                    = attr->max_ah;
 362         resp->max_srq                   = attr->max_srq;
 363         resp->max_srq_wr                = attr->max_srq_wr;
 364         resp->max_srq_sge               = attr->max_srq_sge;
 365         resp->max_pkeys                 = attr->max_pkeys;
 366         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 367         resp->phys_port_cnt = min_t(u32, ib_dev->phys_port_cnt, U8_MAX);
 368 }
 369
 370 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 371 {
 372         struct ib_uverbs_query_device      cmd;
 373         struct ib_uverbs_query_device_resp resp;
 374         struct ib_ucontext *ucontext;
 375         int ret;
 376
 377         ucontext = ib_uverbs_get_ucontext(attrs);
 378         if (IS_ERR(ucontext))
 379                 return PTR_ERR(ucontext);
 380
 381         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 382         if (ret)
 383                 return ret;
 384
 385         memset(&resp, 0, sizeof resp);
 386         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 387
 388         return uverbs_response(attrs, &resp, sizeof(resp));
 389 }
 390
 391 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 392 {
 393         struct ib_uverbs_query_port      cmd;
 394         struct ib_uverbs_query_port_resp resp;
 395         struct ib_port_attr              attr;
 396         int                              ret;
 397         struct ib_ucontext *ucontext;
 398         struct ib_device *ib_dev;
 399
 400         ucontext = ib_uverbs_get_ucontext(attrs);
 401         if (IS_ERR(ucontext))
 402                 return PTR_ERR(ucontext);
 403         ib_dev = ucontext->device;
 404
 405         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 406         if (ret)
 407                 return ret;
 408
 409         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 410         if (ret)
 411                 return ret;
 412
 413         memset(&resp, 0, sizeof resp);
 414         copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 415
 416         return uverbs_response(attrs, &resp, sizeof(resp));
 417 }
 418
 419 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 420 {
 421         struct ib_uverbs_alloc_pd_resp resp = {};
 422         struct ib_uverbs_alloc_pd      cmd;
 423         struct ib_uobject             *uobj;
 424         struct ib_pd                  *pd;
 425         int                            ret;
 426         struct ib_device *ib_dev;
 427
 428         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 429         if (ret)
 430                 return ret;
 431
 432         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 433         if (IS_ERR(uobj))
 434                 return PTR_ERR(uobj);
 435
 436         pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
 437         if (!pd) {
 438                 ret = -ENOMEM;
 439                 goto err;
 440         }
 441
 442         pd->device  = ib_dev;
 443         pd->uobject = uobj;
 444         atomic_set(&pd->usecnt, 0);
 445
 446         rdma_restrack_new(&pd->res, RDMA_RESTRACK_PD);
 447         rdma_restrack_set_name(&pd->res, NULL);
 448
 449         ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
 450         if (ret)
 451                 goto err_alloc;
 452         rdma_restrack_add(&pd->res);
 453
 454         uobj->object = pd;
 455         uobj_finalize_uobj_create(uobj, attrs);
 456
 457         resp.pd_handle = uobj->id;
 458         return uverbs_response(attrs, &resp, sizeof(resp));
 459
 460 err_alloc:
 461         rdma_restrack_put(&pd->res);
 462         kfree(pd);
 463 err:
 464         uobj_alloc_abort(uobj, attrs);
 465         return ret;
 466 }
 467
 468 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 469 {
 470         struct ib_uverbs_dealloc_pd cmd;
 471         int ret;
 472
 473         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 474         if (ret)
 475                 return ret;
 476
 477         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 478 }
 479
 480 struct xrcd_table_entry {
 481         struct rb_node  node;
 482         struct ib_xrcd *xrcd;
 483         struct inode   *inode;
 484 };
 485
 486 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 487                             struct inode *inode,
 488                             struct ib_xrcd *xrcd)
 489 {
 490         struct xrcd_table_entry *entry, *scan;
 491         struct rb_node **p = &dev->xrcd_tree.rb_node;
 492         struct rb_node *parent = NULL;
 493
 494         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 495         if (!entry)
 496                 return -ENOMEM;
 497
 498         entry->xrcd  = xrcd;
 499         entry->inode = inode;
 500
 501         while (*p) {
 502                 parent = *p;
 503                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 504
 505                 if (inode < scan->inode) {
 506                         p = &(*p)->rb_left;
 507                 } else if (inode > scan->inode) {
 508                         p = &(*p)->rb_right;
 509                 } else {
 510                         kfree(entry);
 511                         return -EEXIST;
 512                 }
 513         }
 514
 515         rb_link_node(&entry->node, parent, p);
 516         rb_insert_color(&entry->node, &dev->xrcd_tree);
 517         igrab(inode);
 518         return 0;
 519 }
 520
 521 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 522                                                   struct inode *inode)
 523 {
 524         struct xrcd_table_entry *entry;
 525         struct rb_node *p = dev->xrcd_tree.rb_node;
 526
 527         while (p) {
 528                 entry = rb_entry(p, struct xrcd_table_entry, node);
 529
 530                 if (inode < entry->inode)
 531                         p = p->rb_left;
 532                 else if (inode > entry->inode)
 533                         p = p->rb_right;
 534                 else
 535                         return entry;
 536         }
 537
 538         return NULL;
 539 }
 540
 541 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 542 {
 543         struct xrcd_table_entry *entry;
 544
 545         entry = xrcd_table_search(dev, inode);
 546         if (!entry)
 547                 return NULL;
 548
 549         return entry->xrcd;
 550 }
 551
 552 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 553                               struct inode *inode)
 554 {
 555         struct xrcd_table_entry *entry;
 556
 557         entry = xrcd_table_search(dev, inode);
 558         if (entry) {
 559                 iput(inode);
 560                 rb_erase(&entry->node, &dev->xrcd_tree);
 561                 kfree(entry);
 562         }
 563 }
 564
 565 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 566 {
 567         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 568         struct ib_uverbs_open_xrcd_resp resp = {};
 569         struct ib_uverbs_open_xrcd      cmd;
 570         struct ib_uxrcd_object         *obj;
 571         struct ib_xrcd                 *xrcd = NULL;
 572         struct inode                   *inode = NULL;
 573         int                             new_xrcd = 0;
 574         struct ib_device *ib_dev;
 575         struct fd f = {};
 576         int ret;
 577
 578         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 579         if (ret)
 580                 return ret;
 581
 582         mutex_lock(&ibudev->xrcd_tree_mutex);
 583
 584         if (cmd.fd != -1) {
 585                 /* search for file descriptor */
 586                 f = fdget(cmd.fd);
 587                 if (!f.file) {
 588                         ret = -EBADF;
 589                         goto err_tree_mutex_unlock;
 590                 }
 591
 592                 inode = file_inode(f.file);
 593                 xrcd = find_xrcd(ibudev, inode);
 594                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 595                         /* no file descriptor. Need CREATE flag */
 596                         ret = -EAGAIN;
 597                         goto err_tree_mutex_unlock;
 598                 }
 599
 600                 if (xrcd && cmd.oflags & O_EXCL) {
 601                         ret = -EINVAL;
 602                         goto err_tree_mutex_unlock;
 603                 }
 604         }
 605
 606         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 607                                                    &ib_dev);
 608         if (IS_ERR(obj)) {
 609                 ret = PTR_ERR(obj);
 610                 goto err_tree_mutex_unlock;
 611         }
 612
 613         if (!xrcd) {
 614                 xrcd = ib_alloc_xrcd_user(ib_dev, inode, &attrs->driver_udata);
 615                 if (IS_ERR(xrcd)) {
 616                         ret = PTR_ERR(xrcd);
 617                         goto err;
 618                 }
 619                 new_xrcd = 1;
 620         }
 621
 622         atomic_set(&obj->refcnt, 0);
 623         obj->uobject.object = xrcd;
 624
 625         if (inode) {
 626                 if (new_xrcd) {
 627                         /* create new inode/xrcd table entry */
 628                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 629                         if (ret)
 630                                 goto err_dealloc_xrcd;
 631                 }
 632                 atomic_inc(&xrcd->usecnt);
 633         }
 634
 635         if (f.file)
 636                 fdput(f);
 637
 638         mutex_unlock(&ibudev->xrcd_tree_mutex);
 639         uobj_finalize_uobj_create(&obj->uobject, attrs);
 640
 641         resp.xrcd_handle = obj->uobject.id;
 642         return uverbs_response(attrs, &resp, sizeof(resp));
 643
 644 err_dealloc_xrcd:
 645         ib_dealloc_xrcd_user(xrcd, uverbs_get_cleared_udata(attrs));
 646
 647 err:
 648         uobj_alloc_abort(&obj->uobject, attrs);
 649
 650 err_tree_mutex_unlock:
 651         if (f.file)
 652                 fdput(f);
 653
 654         mutex_unlock(&ibudev->xrcd_tree_mutex);
 655
 656         return ret;
 657 }
 658
 659 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 660 {
 661         struct ib_uverbs_close_xrcd cmd;
 662         int ret;
 663
 664         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 665         if (ret)
 666                 return ret;
 667
 668         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 669 }
 670
 671 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
 672                            enum rdma_remove_reason why,
 673                            struct uverbs_attr_bundle *attrs)
 674 {
 675         struct inode *inode;
 676         int ret;
 677         struct ib_uverbs_device *dev = attrs->ufile->device;
 678
 679         inode = xrcd->inode;
 680         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 681                 return 0;
 682
 683         ret = ib_dealloc_xrcd_user(xrcd, &attrs->driver_udata);
 684         if (ret) {
 685                 atomic_inc(&xrcd->usecnt);
 686                 return ret;
 687         }
 688
 689         if (inode)
 690                 xrcd_table_delete(dev, inode);
 691
 692         return 0;
 693 }
 694
 695 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 696 {
 697         struct ib_uverbs_reg_mr_resp resp = {};
 698         struct ib_uverbs_reg_mr      cmd;
 699         struct ib_uobject           *uobj;
 700         struct ib_pd                *pd;
 701         struct ib_mr                *mr;
 702         int                          ret;
 703         struct ib_device *ib_dev;
 704
 705         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 706         if (ret)
 707                 return ret;
 708
 709         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 710                 return -EINVAL;
 711
 712         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 713         if (IS_ERR(uobj))
 714                 return PTR_ERR(uobj);
 715
 716         ret = ib_check_mr_access(ib_dev, cmd.access_flags);
 717         if (ret)
 718                 goto err_free;
 719
 720         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 721         if (!pd) {
 722                 ret = -EINVAL;
 723                 goto err_free;
 724         }
 725
 726         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 727                                          cmd.access_flags,
 728                                          &attrs->driver_udata);
 729         if (IS_ERR(mr)) {
 730                 ret = PTR_ERR(mr);
 731                 goto err_put;
 732         }
 733
 734         mr->device  = pd->device;
 735         mr->pd      = pd;
 736         mr->type    = IB_MR_TYPE_USER;
 737         mr->dm      = NULL;
 738         mr->sig_attrs = NULL;
 739         mr->uobject = uobj;
 740         atomic_inc(&pd->usecnt);
 741         mr->iova = cmd.hca_va;
 742
 743         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 744         rdma_restrack_set_name(&mr->res, NULL);
 745         rdma_restrack_add(&mr->res);
 746
 747         uobj->object = mr;
 748         uobj_put_obj_read(pd);
 749         uobj_finalize_uobj_create(uobj, attrs);
 750
 751         resp.lkey = mr->lkey;
 752         resp.rkey = mr->rkey;
 753         resp.mr_handle = uobj->id;
 754         return uverbs_response(attrs, &resp, sizeof(resp));
 755
 756 err_put:
 757         uobj_put_obj_read(pd);
 758 err_free:
 759         uobj_alloc_abort(uobj, attrs);
 760         return ret;
 761 }
 762
 763 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 764 {
 765         struct ib_uverbs_rereg_mr      cmd;
 766         struct ib_uverbs_rereg_mr_resp resp;
 767         struct ib_mr                *mr;
 768         int                          ret;
 769         struct ib_uobject           *uobj;
 770         struct ib_uobject *new_uobj;
 771         struct ib_device *ib_dev;
 772         struct ib_pd *orig_pd;
 773         struct ib_pd *new_pd;
 774         struct ib_mr *new_mr;
 775
 776         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 777         if (ret)
 778                 return ret;
 779
 780         if (!cmd.flags)
 781                 return -EINVAL;
 782
 783         if (cmd.flags & ~IB_MR_REREG_SUPPORTED)
 784                 return -EOPNOTSUPP;
 785
 786         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 787             (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 788                 return -EINVAL;
 789
 790         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 791         if (IS_ERR(uobj))
 792                 return PTR_ERR(uobj);
 793
 794         mr = uobj->object;
 795
 796         if (mr->dm) {
 797                 ret = -EINVAL;
 798                 goto put_uobjs;
 799         }
 800
 801         if (cmd.flags & IB_MR_REREG_ACCESS) {
 802                 ret = ib_check_mr_access(mr->device, cmd.access_flags);
 803                 if (ret)
 804                         goto put_uobjs;
 805         }
 806
 807         orig_pd = mr->pd;
 808         if (cmd.flags & IB_MR_REREG_PD) {
 809                 new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 810                                            attrs);
 811                 if (!new_pd) {
 812                         ret = -EINVAL;
 813                         goto put_uobjs;
 814                 }
 815         } else {
 816                 new_pd = mr->pd;
 817         }
 818
 819         /*
 820          * The driver might create a new HW object as part of the rereg, we need
 821          * to have a uobject ready to hold it.
 822          */
 823         new_uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 824         if (IS_ERR(new_uobj)) {
 825                 ret = PTR_ERR(new_uobj);
 826                 goto put_uobj_pd;
 827         }
 828
 829         new_mr = ib_dev->ops.rereg_user_mr(mr, cmd.flags, cmd.start, cmd.length,
 830                                            cmd.hca_va, cmd.access_flags, new_pd,
 831                                            &attrs->driver_udata);
 832         if (IS_ERR(new_mr)) {
 833                 ret = PTR_ERR(new_mr);
 834                 goto put_new_uobj;
 835         }
 836         if (new_mr) {
 837                 new_mr->device = new_pd->device;
 838                 new_mr->pd = new_pd;
 839                 new_mr->type = IB_MR_TYPE_USER;
 840                 new_mr->dm = NULL;
 841                 new_mr->sig_attrs = NULL;
 842                 new_mr->uobject = uobj;
 843                 atomic_inc(&new_pd->usecnt);
 844                 new_mr->iova = cmd.hca_va;
 845                 new_uobj->object = new_mr;
 846
 847                 rdma_restrack_new(&new_mr->res, RDMA_RESTRACK_MR);
 848                 rdma_restrack_set_name(&new_mr->res, NULL);
 849                 rdma_restrack_add(&new_mr->res);
 850
 851                 /*
 852                  * The new uobj for the new HW object is put into the same spot
 853                  * in the IDR and the old uobj & HW object is deleted.
 854                  */
 855                 rdma_assign_uobject(uobj, new_uobj, attrs);
 856                 rdma_alloc_commit_uobject(new_uobj, attrs);
 857                 uobj_put_destroy(uobj);
 858                 new_uobj = NULL;
 859                 uobj = NULL;
 860                 mr = new_mr;
 861         } else {
 862                 if (cmd.flags & IB_MR_REREG_PD) {
 863                         atomic_dec(&orig_pd->usecnt);
 864                         mr->pd = new_pd;
 865                         atomic_inc(&new_pd->usecnt);
 866                 }
 867                 if (cmd.flags & IB_MR_REREG_TRANS)
 868                         mr->iova = cmd.hca_va;
 869         }
 870
 871         memset(&resp, 0, sizeof(resp));
 872         resp.lkey      = mr->lkey;
 873         resp.rkey      = mr->rkey;
 874
 875         ret = uverbs_response(attrs, &resp, sizeof(resp));
 876
 877 put_new_uobj:
 878         if (new_uobj)
 879                 uobj_alloc_abort(new_uobj, attrs);
 880 put_uobj_pd:
 881         if (cmd.flags & IB_MR_REREG_PD)
 882                 uobj_put_obj_read(new_pd);
 883
 884 put_uobjs:
 885         if (uobj)
 886                 uobj_put_write(uobj);
 887
 888         return ret;
 889 }
 890
 891 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 892 {
 893         struct ib_uverbs_dereg_mr cmd;
 894         int ret;
 895
 896         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 897         if (ret)
 898                 return ret;
 899
 900         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 901 }
 902
 903 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 904 {
 905         struct ib_uverbs_alloc_mw      cmd;
 906         struct ib_uverbs_alloc_mw_resp resp = {};
 907         struct ib_uobject             *uobj;
 908         struct ib_pd                  *pd;
 909         struct ib_mw                  *mw;
 910         int                            ret;
 911         struct ib_device *ib_dev;
 912
 913         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 914         if (ret)
 915                 return ret;
 916
 917         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 918         if (IS_ERR(uobj))
 919                 return PTR_ERR(uobj);
 920
 921         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 922         if (!pd) {
 923                 ret = -EINVAL;
 924                 goto err_free;
 925         }
 926
 927         if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
 928                 ret = -EINVAL;
 929                 goto err_put;
 930         }
 931
 932         mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
 933         if (!mw) {
 934                 ret = -ENOMEM;
 935                 goto err_put;
 936         }
 937
 938         mw->device = ib_dev;
 939         mw->pd = pd;
 940         mw->uobject = uobj;
 941         mw->type = cmd.mw_type;
 942
 943         ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
 944         if (ret)
 945                 goto err_alloc;
 946
 947         atomic_inc(&pd->usecnt);
 948
 949         uobj->object = mw;
 950         uobj_put_obj_read(pd);
 951         uobj_finalize_uobj_create(uobj, attrs);
 952
 953         resp.rkey = mw->rkey;
 954         resp.mw_handle = uobj->id;
 955         return uverbs_response(attrs, &resp, sizeof(resp));
 956
 957 err_alloc:
 958         kfree(mw);
 959 err_put:
 960         uobj_put_obj_read(pd);
 961 err_free:
 962         uobj_alloc_abort(uobj, attrs);
 963         return ret;
 964 }
 965
 966 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 967 {
 968         struct ib_uverbs_dealloc_mw cmd;
 969         int ret;
 970
 971         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 972         if (ret)
 973                 return ret;
 974
 975         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 976 }
 977
 978 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 979 {
 980         struct ib_uverbs_create_comp_channel       cmd;
 981         struct ib_uverbs_create_comp_channel_resp  resp;
 982         struct ib_uobject                         *uobj;
 983         struct ib_uverbs_completion_event_file    *ev_file;
 984         struct ib_device *ib_dev;
 985         int ret;
 986
 987         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 988         if (ret)
 989                 return ret;
 990
 991         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 992         if (IS_ERR(uobj))
 993                 return PTR_ERR(uobj);
 994
 995         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 996                                uobj);
 997         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 998         uobj_finalize_uobj_create(uobj, attrs);
 999
1000         resp.fd = uobj->id;
1001         return uverbs_response(attrs, &resp, sizeof(resp));
1002 }
1003
1004 static int create_cq(struct uverbs_attr_bundle *attrs,
1005                      struct ib_uverbs_ex_create_cq *cmd)
1006 {
1007         struct ib_ucq_object           *obj;
1008         struct ib_uverbs_completion_event_file    *ev_file = NULL;
1009         struct ib_cq                   *cq;
1010         int                             ret;
1011         struct ib_uverbs_ex_create_cq_resp resp = {};
1012         struct ib_cq_init_attr attr = {};
1013         struct ib_device *ib_dev;
1014
1015         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1016                 return -EINVAL;
1017
1018         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1019                                                  &ib_dev);
1020         if (IS_ERR(obj))
1021                 return PTR_ERR(obj);
1022
1023         if (cmd->comp_channel >= 0) {
1024                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1025                 if (IS_ERR(ev_file)) {
1026                         ret = PTR_ERR(ev_file);
1027                         goto err;
1028                 }
1029         }
1030
1031         obj->uevent.uobject.user_handle = cmd->user_handle;
1032         INIT_LIST_HEAD(&obj->comp_list);
1033         INIT_LIST_HEAD(&obj->uevent.event_list);
1034
1035         attr.cqe = cmd->cqe;
1036         attr.comp_vector = cmd->comp_vector;
1037         attr.flags = cmd->flags;
1038
1039         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1040         if (!cq) {
1041                 ret = -ENOMEM;
1042                 goto err_file;
1043         }
1044         cq->device        = ib_dev;
1045         cq->uobject       = obj;
1046         cq->comp_handler  = ib_uverbs_comp_handler;
1047         cq->event_handler = ib_uverbs_cq_event_handler;
1048         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1049         atomic_set(&cq->usecnt, 0);
1050
1051         rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1052         rdma_restrack_set_name(&cq->res, NULL);
1053
1054         ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1055         if (ret)
1056                 goto err_free;
1057         rdma_restrack_add(&cq->res);
1058
1059         obj->uevent.uobject.object = cq;
1060         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1061         if (obj->uevent.event_file)
1062                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1063         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1064
1065         resp.base.cq_handle = obj->uevent.uobject.id;
1066         resp.base.cqe = cq->cqe;
1067         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1068         return uverbs_response(attrs, &resp, sizeof(resp));
1069
1070 err_free:
1071         rdma_restrack_put(&cq->res);
1072         kfree(cq);
1073 err_file:
1074         if (ev_file)
1075                 ib_uverbs_release_ucq(ev_file, obj);
1076 err:
1077         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1078         return ret;
1079 }
1080
1081 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1082 {
1083         struct ib_uverbs_create_cq      cmd;
1084         struct ib_uverbs_ex_create_cq   cmd_ex;
1085         int ret;
1086
1087         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1088         if (ret)
1089                 return ret;
1090
1091         memset(&cmd_ex, 0, sizeof(cmd_ex));
1092         cmd_ex.user_handle = cmd.user_handle;
1093         cmd_ex.cqe = cmd.cqe;
1094         cmd_ex.comp_vector = cmd.comp_vector;
1095         cmd_ex.comp_channel = cmd.comp_channel;
1096
1097         return create_cq(attrs, &cmd_ex);
1098 }
1099
1100 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1101 {
1102         struct ib_uverbs_ex_create_cq  cmd;
1103         int ret;
1104
1105         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1106         if (ret)
1107                 return ret;
1108
1109         if (cmd.comp_mask)
1110                 return -EINVAL;
1111
1112         if (cmd.reserved)
1113                 return -EINVAL;
1114
1115         return create_cq(attrs, &cmd);
1116 }
1117
1118 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1119 {
1120         struct ib_uverbs_resize_cq      cmd;
1121         struct ib_uverbs_resize_cq_resp resp = {};
1122         struct ib_cq                    *cq;
1123         int ret;
1124
1125         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1126         if (ret)
1127                 return ret;
1128
1129         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1130         if (!cq)
1131                 return -EINVAL;
1132
1133         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1134         if (ret)
1135                 goto out;
1136
1137         resp.cqe = cq->cqe;
1138
1139         ret = uverbs_response(attrs, &resp, sizeof(resp));
1140 out:
1141         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1142                                 UVERBS_LOOKUP_READ);
1143
1144         return ret;
1145 }
1146
1147 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1148                            struct ib_wc *wc)
1149 {
1150         struct ib_uverbs_wc tmp;
1151
1152         tmp.wr_id               = wc->wr_id;
1153         tmp.status              = wc->status;
1154         tmp.opcode              = wc->opcode;
1155         tmp.vendor_err          = wc->vendor_err;
1156         tmp.byte_len            = wc->byte_len;
1157         tmp.ex.imm_data         = wc->ex.imm_data;
1158         tmp.qp_num              = wc->qp->qp_num;
1159         tmp.src_qp              = wc->src_qp;
1160         tmp.wc_flags            = wc->wc_flags;
1161         tmp.pkey_index          = wc->pkey_index;
1162         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1163                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1164         else
1165                 tmp.slid        = ib_lid_cpu16(wc->slid);
1166         tmp.sl                  = wc->sl;
1167         tmp.dlid_path_bits      = wc->dlid_path_bits;
1168         tmp.port_num            = wc->port_num;
1169         tmp.reserved            = 0;
1170
1171         if (copy_to_user(dest, &tmp, sizeof tmp))
1172                 return -EFAULT;
1173
1174         return 0;
1175 }
1176
1177 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1178 {
1179         struct ib_uverbs_poll_cq       cmd;
1180         struct ib_uverbs_poll_cq_resp  resp;
1181         u8 __user                     *header_ptr;
1182         u8 __user                     *data_ptr;
1183         struct ib_cq                  *cq;
1184         struct ib_wc                   wc;
1185         int                            ret;
1186
1187         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1188         if (ret)
1189                 return ret;
1190
1191         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1192         if (!cq)
1193                 return -EINVAL;
1194
1195         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1196         header_ptr = attrs->ucore.outbuf;
1197         data_ptr = header_ptr + sizeof resp;
1198
1199         memset(&resp, 0, sizeof resp);
1200         while (resp.count < cmd.ne) {
1201                 ret = ib_poll_cq(cq, 1, &wc);
1202                 if (ret < 0)
1203                         goto out_put;
1204                 if (!ret)
1205                         break;
1206
1207                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1208                 if (ret)
1209                         goto out_put;
1210
1211                 data_ptr += sizeof(struct ib_uverbs_wc);
1212                 ++resp.count;
1213         }
1214
1215         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1216                 ret = -EFAULT;
1217                 goto out_put;
1218         }
1219         ret = 0;
1220
1221         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1222                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1223
1224 out_put:
1225         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1226                                 UVERBS_LOOKUP_READ);
1227         return ret;
1228 }
1229
1230 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1231 {
1232         struct ib_uverbs_req_notify_cq cmd;
1233         struct ib_cq                  *cq;
1234         int ret;
1235
1236         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1237         if (ret)
1238                 return ret;
1239
1240         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1241         if (!cq)
1242                 return -EINVAL;
1243
1244         ib_req_notify_cq(cq, cmd.solicited_only ?
1245                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1246
1247         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1248                                 UVERBS_LOOKUP_READ);
1249         return 0;
1250 }
1251
1252 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1253 {
1254         struct ib_uverbs_destroy_cq      cmd;
1255         struct ib_uverbs_destroy_cq_resp resp;
1256         struct ib_uobject               *uobj;
1257         struct ib_ucq_object            *obj;
1258         int ret;
1259
1260         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1261         if (ret)
1262                 return ret;
1263
1264         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1265         if (IS_ERR(uobj))
1266                 return PTR_ERR(uobj);
1267
1268         obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1269         memset(&resp, 0, sizeof(resp));
1270         resp.comp_events_reported  = obj->comp_events_reported;
1271         resp.async_events_reported = obj->uevent.events_reported;
1272
1273         uobj_put_destroy(uobj);
1274
1275         return uverbs_response(attrs, &resp, sizeof(resp));
1276 }
1277
1278 static int create_qp(struct uverbs_attr_bundle *attrs,
1279                      struct ib_uverbs_ex_create_qp *cmd)
1280 {
1281         struct ib_uqp_object            *obj;
1282         struct ib_device                *device;
1283         struct ib_pd                    *pd = NULL;
1284         struct ib_xrcd                  *xrcd = NULL;
1285         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1286         struct ib_cq                    *scq = NULL, *rcq = NULL;
1287         struct ib_srq                   *srq = NULL;
1288         struct ib_qp                    *qp;
1289         struct ib_qp_init_attr          attr = {};
1290         struct ib_uverbs_ex_create_qp_resp resp = {};
1291         int                             ret;
1292         struct ib_rwq_ind_table *ind_tbl = NULL;
1293         bool has_sq = true;
1294         struct ib_device *ib_dev;
1295
1296         switch (cmd->qp_type) {
1297         case IB_QPT_RAW_PACKET:
1298                 if (!capable(CAP_NET_RAW))
1299                         return -EPERM;
1300                 break;
1301         case IB_QPT_RC:
1302         case IB_QPT_UC:
1303         case IB_QPT_UD:
1304         case IB_QPT_XRC_INI:
1305         case IB_QPT_XRC_TGT:
1306         case IB_QPT_DRIVER:
1307                 break;
1308         default:
1309                 return -EINVAL;
1310         }
1311
1312         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1313                                                  &ib_dev);
1314         if (IS_ERR(obj))
1315                 return PTR_ERR(obj);
1316         obj->uxrcd = NULL;
1317         obj->uevent.uobject.user_handle = cmd->user_handle;
1318         mutex_init(&obj->mcast_lock);
1319
1320         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1321                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1322                                             UVERBS_OBJECT_RWQ_IND_TBL,
1323                                             cmd->rwq_ind_tbl_handle, attrs);
1324                 if (!ind_tbl) {
1325                         ret = -EINVAL;
1326                         goto err_put;
1327                 }
1328
1329                 attr.rwq_ind_tbl = ind_tbl;
1330         }
1331
1332         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1333                 ret = -EINVAL;
1334                 goto err_put;
1335         }
1336
1337         if (ind_tbl && !cmd->max_send_wr)
1338                 has_sq = false;
1339
1340         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1341                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1342                                           attrs);
1343
1344                 if (IS_ERR(xrcd_uobj)) {
1345                         ret = -EINVAL;
1346                         goto err_put;
1347                 }
1348
1349                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1350                 if (!xrcd) {
1351                         ret = -EINVAL;
1352                         goto err_put;
1353                 }
1354                 device = xrcd->device;
1355         } else {
1356                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1357                         cmd->max_recv_wr = 0;
1358                         cmd->max_recv_sge = 0;
1359                 } else {
1360                         if (cmd->is_srq) {
1361                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1362                                                         cmd->srq_handle, attrs);
1363                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1364                                         ret = -EINVAL;
1365                                         goto err_put;
1366                                 }
1367                         }
1368
1369                         if (!ind_tbl) {
1370                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1371                                         rcq = uobj_get_obj_read(
1372                                                 cq, UVERBS_OBJECT_CQ,
1373                                                 cmd->recv_cq_handle, attrs);
1374                                         if (!rcq) {
1375                                                 ret = -EINVAL;
1376                                                 goto err_put;
1377                                         }
1378                                 }
1379                         }
1380                 }
1381
1382                 if (has_sq)
1383                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1384                                                 cmd->send_cq_handle, attrs);
1385                 if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI)
1386                         rcq = rcq ?: scq;
1387                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1388                                        attrs);
1389                 if (!pd || (!scq && has_sq)) {
1390                         ret = -EINVAL;
1391                         goto err_put;
1392                 }
1393
1394                 device = pd->device;
1395         }
1396
1397         attr.event_handler = ib_uverbs_qp_event_handler;
1398         attr.send_cq       = scq;
1399         attr.recv_cq       = rcq;
1400         attr.srq           = srq;
1401         attr.xrcd          = xrcd;
1402         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1403                                               IB_SIGNAL_REQ_WR;
1404         attr.qp_type       = cmd->qp_type;
1405         attr.create_flags  = 0;
1406
1407         attr.cap.max_send_wr     = cmd->max_send_wr;
1408         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1409         attr.cap.max_send_sge    = cmd->max_send_sge;
1410         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1411         attr.cap.max_inline_data = cmd->max_inline_data;
1412
1413         INIT_LIST_HEAD(&obj->uevent.event_list);
1414         INIT_LIST_HEAD(&obj->mcast_list);
1415
1416         attr.create_flags = cmd->create_flags;
1417         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1418                                 IB_QP_CREATE_CROSS_CHANNEL |
1419                                 IB_QP_CREATE_MANAGED_SEND |
1420                                 IB_QP_CREATE_MANAGED_RECV |
1421                                 IB_QP_CREATE_SCATTER_FCS |
1422                                 IB_QP_CREATE_CVLAN_STRIPPING |
1423                                 IB_QP_CREATE_SOURCE_QPN |
1424                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1425                 ret = -EINVAL;
1426                 goto err_put;
1427         }
1428
1429         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1430                 if (!capable(CAP_NET_RAW)) {
1431                         ret = -EPERM;
1432                         goto err_put;
1433                 }
1434
1435                 attr.source_qpn = cmd->source_qpn;
1436         }
1437
1438         qp = ib_create_qp_user(device, pd, &attr, &attrs->driver_udata, obj,
1439                                KBUILD_MODNAME);
1440         if (IS_ERR(qp)) {
1441                 ret = PTR_ERR(qp);
1442                 goto err_put;
1443         }
1444         ib_qp_usecnt_inc(qp);
1445
1446         obj->uevent.uobject.object = qp;
1447         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1448         if (obj->uevent.event_file)
1449                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1450
1451         if (xrcd) {
1452                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1453                                           uobject);
1454                 atomic_inc(&obj->uxrcd->refcnt);
1455                 uobj_put_read(xrcd_uobj);
1456         }
1457
1458         if (pd)
1459                 uobj_put_obj_read(pd);
1460         if (scq)
1461                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1462                                         UVERBS_LOOKUP_READ);
1463         if (rcq && rcq != scq)
1464                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1465                                         UVERBS_LOOKUP_READ);
1466         if (srq)
1467                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1468                                         UVERBS_LOOKUP_READ);
1469         if (ind_tbl)
1470                 uobj_put_obj_read(ind_tbl);
1471         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1472
1473         resp.base.qpn             = qp->qp_num;
1474         resp.base.qp_handle       = obj->uevent.uobject.id;
1475         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1476         resp.base.max_send_sge    = attr.cap.max_send_sge;
1477         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1478         resp.base.max_send_wr     = attr.cap.max_send_wr;
1479         resp.base.max_inline_data = attr.cap.max_inline_data;
1480         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1481         return uverbs_response(attrs, &resp, sizeof(resp));
1482
1483 err_put:
1484         if (!IS_ERR(xrcd_uobj))
1485                 uobj_put_read(xrcd_uobj);
1486         if (pd)
1487                 uobj_put_obj_read(pd);
1488         if (scq)
1489                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1490                                         UVERBS_LOOKUP_READ);
1491         if (rcq && rcq != scq)
1492                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1493                                         UVERBS_LOOKUP_READ);
1494         if (srq)
1495                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1496                                         UVERBS_LOOKUP_READ);
1497         if (ind_tbl)
1498                 uobj_put_obj_read(ind_tbl);
1499
1500         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1501         return ret;
1502 }
1503
1504 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1505 {
1506         struct ib_uverbs_create_qp      cmd;
1507         struct ib_uverbs_ex_create_qp   cmd_ex;
1508         int ret;
1509
1510         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1511         if (ret)
1512                 return ret;
1513
1514         memset(&cmd_ex, 0, sizeof(cmd_ex));
1515         cmd_ex.user_handle = cmd.user_handle;
1516         cmd_ex.pd_handle = cmd.pd_handle;
1517         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1518         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1519         cmd_ex.srq_handle = cmd.srq_handle;
1520         cmd_ex.max_send_wr = cmd.max_send_wr;
1521         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1522         cmd_ex.max_send_sge = cmd.max_send_sge;
1523         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1524         cmd_ex.max_inline_data = cmd.max_inline_data;
1525         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1526         cmd_ex.qp_type = cmd.qp_type;
1527         cmd_ex.is_srq = cmd.is_srq;
1528
1529         return create_qp(attrs, &cmd_ex);
1530 }
1531
1532 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1533 {
1534         struct ib_uverbs_ex_create_qp cmd;
1535         int ret;
1536
1537         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1538         if (ret)
1539                 return ret;
1540
1541         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1542                 return -EINVAL;
1543
1544         if (cmd.reserved)
1545                 return -EINVAL;
1546
1547         return create_qp(attrs, &cmd);
1548 }
1549
1550 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1551 {
1552         struct ib_uverbs_create_qp_resp resp = {};
1553         struct ib_uverbs_open_qp        cmd;
1554         struct ib_uqp_object           *obj;
1555         struct ib_xrcd                 *xrcd;
1556         struct ib_qp                   *qp;
1557         struct ib_qp_open_attr          attr = {};
1558         int ret;
1559         struct ib_uobject *xrcd_uobj;
1560         struct ib_device *ib_dev;
1561
1562         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1563         if (ret)
1564                 return ret;
1565
1566         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1567                                                  &ib_dev);
1568         if (IS_ERR(obj))
1569                 return PTR_ERR(obj);
1570
1571         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1572         if (IS_ERR(xrcd_uobj)) {
1573                 ret = -EINVAL;
1574                 goto err_put;
1575         }
1576
1577         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1578         if (!xrcd) {
1579                 ret = -EINVAL;
1580                 goto err_xrcd;
1581         }
1582
1583         attr.event_handler = ib_uverbs_qp_event_handler;
1584         attr.qp_num        = cmd.qpn;
1585         attr.qp_type       = cmd.qp_type;
1586
1587         INIT_LIST_HEAD(&obj->uevent.event_list);
1588         INIT_LIST_HEAD(&obj->mcast_list);
1589
1590         qp = ib_open_qp(xrcd, &attr);
1591         if (IS_ERR(qp)) {
1592                 ret = PTR_ERR(qp);
1593                 goto err_xrcd;
1594         }
1595
1596         obj->uevent.uobject.object = qp;
1597         obj->uevent.uobject.user_handle = cmd.user_handle;
1598
1599         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1600         atomic_inc(&obj->uxrcd->refcnt);
1601         qp->uobject = obj;
1602         uobj_put_read(xrcd_uobj);
1603         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1604
1605         resp.qpn = qp->qp_num;
1606         resp.qp_handle = obj->uevent.uobject.id;
1607         return uverbs_response(attrs, &resp, sizeof(resp));
1608
1609 err_xrcd:
1610         uobj_put_read(xrcd_uobj);
1611 err_put:
1612         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1613         return ret;
1614 }
1615
1616 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1617                                    struct rdma_ah_attr *rdma_attr)
1618 {
1619         const struct ib_global_route   *grh;
1620
1621         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1622         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1623         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1624         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1625         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1626                                          IB_AH_GRH);
1627         if (uverb_attr->is_global) {
1628                 grh = rdma_ah_read_grh(rdma_attr);
1629                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1630                 uverb_attr->flow_label        = grh->flow_label;
1631                 uverb_attr->sgid_index        = grh->sgid_index;
1632                 uverb_attr->hop_limit         = grh->hop_limit;
1633                 uverb_attr->traffic_class     = grh->traffic_class;
1634         }
1635         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1636 }
1637
1638 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1639 {
1640         struct ib_uverbs_query_qp      cmd;
1641         struct ib_uverbs_query_qp_resp resp;
1642         struct ib_qp                   *qp;
1643         struct ib_qp_attr              *attr;
1644         struct ib_qp_init_attr         *init_attr;
1645         int                            ret;
1646
1647         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1648         if (ret)
1649                 return ret;
1650
1651         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1652         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1653         if (!attr || !init_attr) {
1654                 ret = -ENOMEM;
1655                 goto out;
1656         }
1657
1658         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1659         if (!qp) {
1660                 ret = -EINVAL;
1661                 goto out;
1662         }
1663
1664         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1665
1666         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1667                                 UVERBS_LOOKUP_READ);
1668
1669         if (ret)
1670                 goto out;
1671
1672         memset(&resp, 0, sizeof resp);
1673
1674         resp.qp_state               = attr->qp_state;
1675         resp.cur_qp_state           = attr->cur_qp_state;
1676         resp.path_mtu               = attr->path_mtu;
1677         resp.path_mig_state         = attr->path_mig_state;
1678         resp.qkey                   = attr->qkey;
1679         resp.rq_psn                 = attr->rq_psn;
1680         resp.sq_psn                 = attr->sq_psn;
1681         resp.dest_qp_num            = attr->dest_qp_num;
1682         resp.qp_access_flags        = attr->qp_access_flags;
1683         resp.pkey_index             = attr->pkey_index;
1684         resp.alt_pkey_index         = attr->alt_pkey_index;
1685         resp.sq_draining            = attr->sq_draining;
1686         resp.max_rd_atomic          = attr->max_rd_atomic;
1687         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1688         resp.min_rnr_timer          = attr->min_rnr_timer;
1689         resp.port_num               = attr->port_num;
1690         resp.timeout                = attr->timeout;
1691         resp.retry_cnt              = attr->retry_cnt;
1692         resp.rnr_retry              = attr->rnr_retry;
1693         resp.alt_port_num           = attr->alt_port_num;
1694         resp.alt_timeout            = attr->alt_timeout;
1695
1696         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1697         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1698
1699         resp.max_send_wr            = init_attr->cap.max_send_wr;
1700         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1701         resp.max_send_sge           = init_attr->cap.max_send_sge;
1702         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1703         resp.max_inline_data        = init_attr->cap.max_inline_data;
1704         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1705
1706         ret = uverbs_response(attrs, &resp, sizeof(resp));
1707
1708 out:
1709         kfree(attr);
1710         kfree(init_attr);
1711
1712         return ret;
1713 }
1714
1715 /* Remove ignored fields set in the attribute mask */
1716 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1717 {
1718         switch (qp_type) {
1719         case IB_QPT_XRC_INI:
1720                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1721         case IB_QPT_XRC_TGT:
1722                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1723                                 IB_QP_RNR_RETRY);
1724         default:
1725                 return mask;
1726         }
1727 }
1728
1729 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1730                                      struct rdma_ah_attr *rdma_attr,
1731                                      struct ib_uverbs_qp_dest *uverb_attr)
1732 {
1733         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1734         if (uverb_attr->is_global) {
1735                 rdma_ah_set_grh(rdma_attr, NULL,
1736                                 uverb_attr->flow_label,
1737                                 uverb_attr->sgid_index,
1738                                 uverb_attr->hop_limit,
1739                                 uverb_attr->traffic_class);
1740                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1741         } else {
1742                 rdma_ah_set_ah_flags(rdma_attr, 0);
1743         }
1744         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1745         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1746         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1747         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1748         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1749         rdma_ah_set_make_grd(rdma_attr, false);
1750 }
1751
1752 static int modify_qp(struct uverbs_attr_bundle *attrs,
1753                      struct ib_uverbs_ex_modify_qp *cmd)
1754 {
1755         struct ib_qp_attr *attr;
1756         struct ib_qp *qp;
1757         int ret;
1758
1759         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1760         if (!attr)
1761                 return -ENOMEM;
1762
1763         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1764                                attrs);
1765         if (!qp) {
1766                 ret = -EINVAL;
1767                 goto out;
1768         }
1769
1770         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1771             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1772                 ret = -EINVAL;
1773                 goto release_qp;
1774         }
1775
1776         if ((cmd->base.attr_mask & IB_QP_AV)) {
1777                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1778                         ret = -EINVAL;
1779                         goto release_qp;
1780                 }
1781
1782                 if (cmd->base.attr_mask & IB_QP_STATE &&
1783                     cmd->base.qp_state == IB_QPS_RTR) {
1784                 /* We are in INIT->RTR TRANSITION (if we are not,
1785                  * this transition will be rejected in subsequent checks).
1786                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1787                  * but the IB_QP_STATE flag is required.
1788                  *
1789                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1790                  * when IB_QP_AV is set, has required inclusion of a valid
1791                  * port number in the primary AV. (AVs are created and handled
1792                  * differently for infiniband and ethernet (RoCE) ports).
1793                  *
1794                  * Check the port number included in the primary AV against
1795                  * the port number in the qp struct, which was set (and saved)
1796                  * in the RST->INIT transition.
1797                  */
1798                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1799                                 ret = -EINVAL;
1800                                 goto release_qp;
1801                         }
1802                 } else {
1803                 /* We are in SQD->SQD. (If we are not, this transition will
1804                  * be rejected later in the verbs layer checks).
1805                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1806                  * together in the SQD->SQD transition.
1807                  *
1808                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1809                  * verbs layer driver does not track primary port changes
1810                  * resulting from path migration. Thus, in SQD, if the primary
1811                  * AV is modified, the primary port should also be modified).
1812                  *
1813                  * Note that in this transition, the IB_QP_STATE flag
1814                  * is not allowed.
1815                  */
1816                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1817                              == (IB_QP_AV | IB_QP_PORT)) &&
1818                             cmd->base.port_num != cmd->base.dest.port_num) {
1819                                 ret = -EINVAL;
1820                                 goto release_qp;
1821                         }
1822                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1823                             == IB_QP_AV) {
1824                                 cmd->base.attr_mask |= IB_QP_PORT;
1825                                 cmd->base.port_num = cmd->base.dest.port_num;
1826                         }
1827                 }
1828         }
1829
1830         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1831             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1832             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1833             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1834                 ret = -EINVAL;
1835                 goto release_qp;
1836         }
1837
1838         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1839             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1840             (cmd->base.attr_mask & IB_QP_STATE &&
1841             cmd->base.qp_state > IB_QPS_ERR)) {
1842                 ret = -EINVAL;
1843                 goto release_qp;
1844         }
1845
1846         if (cmd->base.attr_mask & IB_QP_STATE)
1847                 attr->qp_state = cmd->base.qp_state;
1848         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1849                 attr->cur_qp_state = cmd->base.cur_qp_state;
1850         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1851                 attr->path_mtu = cmd->base.path_mtu;
1852         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1853                 attr->path_mig_state = cmd->base.path_mig_state;
1854         if (cmd->base.attr_mask & IB_QP_QKEY)
1855                 attr->qkey = cmd->base.qkey;
1856         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1857                 attr->rq_psn = cmd->base.rq_psn;
1858         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1859                 attr->sq_psn = cmd->base.sq_psn;
1860         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1861                 attr->dest_qp_num = cmd->base.dest_qp_num;
1862         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1863                 attr->qp_access_flags = cmd->base.qp_access_flags;
1864         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1865                 attr->pkey_index = cmd->base.pkey_index;
1866         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1867                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1868         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1869                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1870         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1871                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1872         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1873                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1874         if (cmd->base.attr_mask & IB_QP_PORT)
1875                 attr->port_num = cmd->base.port_num;
1876         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1877                 attr->timeout = cmd->base.timeout;
1878         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1879                 attr->retry_cnt = cmd->base.retry_cnt;
1880         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1881                 attr->rnr_retry = cmd->base.rnr_retry;
1882         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1883                 attr->alt_port_num = cmd->base.alt_port_num;
1884                 attr->alt_timeout = cmd->base.alt_timeout;
1885                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1886         }
1887         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1888                 attr->rate_limit = cmd->rate_limit;
1889
1890         if (cmd->base.attr_mask & IB_QP_AV)
1891                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1892                                          &cmd->base.dest);
1893
1894         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1895                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1896                                          &cmd->base.alt_dest);
1897
1898         ret = ib_modify_qp_with_udata(qp, attr,
1899                                       modify_qp_mask(qp->qp_type,
1900                                                      cmd->base.attr_mask),
1901                                       &attrs->driver_udata);
1902
1903 release_qp:
1904         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1905                                 UVERBS_LOOKUP_READ);
1906 out:
1907         kfree(attr);
1908
1909         return ret;
1910 }
1911
1912 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1913 {
1914         struct ib_uverbs_ex_modify_qp cmd;
1915         int ret;
1916
1917         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1918         if (ret)
1919                 return ret;
1920
1921         if (cmd.base.attr_mask & ~IB_QP_ATTR_STANDARD_BITS)
1922                 return -EOPNOTSUPP;
1923
1924         return modify_qp(attrs, &cmd);
1925 }
1926
1927 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1928 {
1929         struct ib_uverbs_ex_modify_qp cmd;
1930         struct ib_uverbs_ex_modify_qp_resp resp = {
1931                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1932         };
1933         int ret;
1934
1935         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1936         if (ret)
1937                 return ret;
1938
1939         /*
1940          * Last bit is reserved for extending the attr_mask by
1941          * using another field.
1942          */
1943         if (cmd.base.attr_mask & ~(IB_QP_ATTR_STANDARD_BITS | IB_QP_RATE_LIMIT))
1944                 return -EOPNOTSUPP;
1945
1946         ret = modify_qp(attrs, &cmd);
1947         if (ret)
1948                 return ret;
1949
1950         return uverbs_response(attrs, &resp, sizeof(resp));
1951 }
1952
1953 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1954 {
1955         struct ib_uverbs_destroy_qp      cmd;
1956         struct ib_uverbs_destroy_qp_resp resp;
1957         struct ib_uobject               *uobj;
1958         struct ib_uqp_object            *obj;
1959         int ret;
1960
1961         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1962         if (ret)
1963                 return ret;
1964
1965         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1966         if (IS_ERR(uobj))
1967                 return PTR_ERR(uobj);
1968
1969         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
1970         memset(&resp, 0, sizeof(resp));
1971         resp.events_reported = obj->uevent.events_reported;
1972
1973         uobj_put_destroy(uobj);
1974
1975         return uverbs_response(attrs, &resp, sizeof(resp));
1976 }
1977
1978 static void *alloc_wr(size_t wr_size, __u32 num_sge)
1979 {
1980         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof(struct ib_sge))) /
1981                                sizeof(struct ib_sge))
1982                 return NULL;
1983
1984         return kmalloc(ALIGN(wr_size, sizeof(struct ib_sge)) +
1985                                num_sge * sizeof(struct ib_sge),
1986                        GFP_KERNEL);
1987 }
1988
1989 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1990 {
1991         struct ib_uverbs_post_send      cmd;
1992         struct ib_uverbs_post_send_resp resp;
1993         struct ib_uverbs_send_wr       *user_wr;
1994         struct ib_send_wr              *wr = NULL, *last, *next;
1995         const struct ib_send_wr        *bad_wr;
1996         struct ib_qp                   *qp;
1997         int                             i, sg_ind;
1998         int                             is_ud;
1999         int ret, ret2;
2000         size_t                          next_size;
2001         const struct ib_sge __user *sgls;
2002         const void __user *wqes;
2003         struct uverbs_req_iter iter;
2004
2005         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2006         if (ret)
2007                 return ret;
2008         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2009         if (IS_ERR(wqes))
2010                 return PTR_ERR(wqes);
2011         sgls = uverbs_request_next_ptr(
2012                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2013         if (IS_ERR(sgls))
2014                 return PTR_ERR(sgls);
2015         ret = uverbs_request_finish(&iter);
2016         if (ret)
2017                 return ret;
2018
2019         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2020         if (!user_wr)
2021                 return -ENOMEM;
2022
2023         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2024         if (!qp) {
2025                 ret = -EINVAL;
2026                 goto out;
2027         }
2028
2029         is_ud = qp->qp_type == IB_QPT_UD;
2030         sg_ind = 0;
2031         last = NULL;
2032         for (i = 0; i < cmd.wr_count; ++i) {
2033                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2034                                    cmd.wqe_size)) {
2035                         ret = -EFAULT;
2036                         goto out_put;
2037                 }
2038
2039                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2040                         ret = -EINVAL;
2041                         goto out_put;
2042                 }
2043
2044                 if (is_ud) {
2045                         struct ib_ud_wr *ud;
2046
2047                         if (user_wr->opcode != IB_WR_SEND &&
2048                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2049                                 ret = -EINVAL;
2050                                 goto out_put;
2051                         }
2052
2053                         next_size = sizeof(*ud);
2054                         ud = alloc_wr(next_size, user_wr->num_sge);
2055                         if (!ud) {
2056                                 ret = -ENOMEM;
2057                                 goto out_put;
2058                         }
2059
2060                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2061                                                    user_wr->wr.ud.ah, attrs);
2062                         if (!ud->ah) {
2063                                 kfree(ud);
2064                                 ret = -EINVAL;
2065                                 goto out_put;
2066                         }
2067                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2068                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2069
2070                         next = &ud->wr;
2071                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2072                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2073                            user_wr->opcode == IB_WR_RDMA_READ) {
2074                         struct ib_rdma_wr *rdma;
2075
2076                         next_size = sizeof(*rdma);
2077                         rdma = alloc_wr(next_size, user_wr->num_sge);
2078                         if (!rdma) {
2079                                 ret = -ENOMEM;
2080                                 goto out_put;
2081                         }
2082
2083                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2084                         rdma->rkey = user_wr->wr.rdma.rkey;
2085
2086                         next = &rdma->wr;
2087                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2088                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2089                         struct ib_atomic_wr *atomic;
2090
2091                         next_size = sizeof(*atomic);
2092                         atomic = alloc_wr(next_size, user_wr->num_sge);
2093                         if (!atomic) {
2094                                 ret = -ENOMEM;
2095                                 goto out_put;
2096                         }
2097
2098                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2099                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2100                         atomic->swap = user_wr->wr.atomic.swap;
2101                         atomic->rkey = user_wr->wr.atomic.rkey;
2102
2103                         next = &atomic->wr;
2104                 } else if (user_wr->opcode == IB_WR_SEND ||
2105                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2106                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2107                         next_size = sizeof(*next);
2108                         next = alloc_wr(next_size, user_wr->num_sge);
2109                         if (!next) {
2110                                 ret = -ENOMEM;
2111                                 goto out_put;
2112                         }
2113                 } else {
2114                         ret = -EINVAL;
2115                         goto out_put;
2116                 }
2117
2118                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2119                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2120                         next->ex.imm_data =
2121                                         (__be32 __force) user_wr->ex.imm_data;
2122                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2123                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2124                 }
2125
2126                 if (!last)
2127                         wr = next;
2128                 else
2129                         last->next = next;
2130                 last = next;
2131
2132                 next->next       = NULL;
2133                 next->wr_id      = user_wr->wr_id;
2134                 next->num_sge    = user_wr->num_sge;
2135                 next->opcode     = user_wr->opcode;
2136                 next->send_flags = user_wr->send_flags;
2137
2138                 if (next->num_sge) {
2139                         next->sg_list = (void *) next +
2140                                 ALIGN(next_size, sizeof(struct ib_sge));
2141                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2142                                            next->num_sge *
2143                                                    sizeof(struct ib_sge))) {
2144                                 ret = -EFAULT;
2145                                 goto out_put;
2146                         }
2147                         sg_ind += next->num_sge;
2148                 } else
2149                         next->sg_list = NULL;
2150         }
2151
2152         resp.bad_wr = 0;
2153         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2154         if (ret)
2155                 for (next = wr; next; next = next->next) {
2156                         ++resp.bad_wr;
2157                         if (next == bad_wr)
2158                                 break;
2159                 }
2160
2161         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2162         if (ret2)
2163                 ret = ret2;
2164
2165 out_put:
2166         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2167                                 UVERBS_LOOKUP_READ);
2168
2169         while (wr) {
2170                 if (is_ud && ud_wr(wr)->ah)
2171                         uobj_put_obj_read(ud_wr(wr)->ah);
2172                 next = wr->next;
2173                 kfree(wr);
2174                 wr = next;
2175         }
2176
2177 out:
2178         kfree(user_wr);
2179
2180         return ret;
2181 }
2182
2183 static struct ib_recv_wr *
2184 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2185                           u32 wqe_size, u32 sge_count)
2186 {
2187         struct ib_uverbs_recv_wr *user_wr;
2188         struct ib_recv_wr        *wr = NULL, *last, *next;
2189         int                       sg_ind;
2190         int                       i;
2191         int                       ret;
2192         const struct ib_sge __user *sgls;
2193         const void __user *wqes;
2194
2195         if (wqe_size < sizeof(struct ib_uverbs_recv_wr))
2196                 return ERR_PTR(-EINVAL);
2197
2198         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2199         if (IS_ERR(wqes))
2200                 return ERR_CAST(wqes);
2201         sgls = uverbs_request_next_ptr(
2202                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2203         if (IS_ERR(sgls))
2204                 return ERR_CAST(sgls);
2205         ret = uverbs_request_finish(iter);
2206         if (ret)
2207                 return ERR_PTR(ret);
2208
2209         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2210         if (!user_wr)
2211                 return ERR_PTR(-ENOMEM);
2212
2213         sg_ind = 0;
2214         last = NULL;
2215         for (i = 0; i < wr_count; ++i) {
2216                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2217                                    wqe_size)) {
2218                         ret = -EFAULT;
2219                         goto err;
2220                 }
2221
2222                 if (user_wr->num_sge + sg_ind > sge_count) {
2223                         ret = -EINVAL;
2224                         goto err;
2225                 }
2226
2227                 if (user_wr->num_sge >=
2228                     (U32_MAX - ALIGN(sizeof(*next), sizeof(struct ib_sge))) /
2229                             sizeof(struct ib_sge)) {
2230                         ret = -EINVAL;
2231                         goto err;
2232                 }
2233
2234                 next = kmalloc(ALIGN(sizeof(*next), sizeof(struct ib_sge)) +
2235                                        user_wr->num_sge * sizeof(struct ib_sge),
2236                                GFP_KERNEL);
2237                 if (!next) {
2238                         ret = -ENOMEM;
2239                         goto err;
2240                 }
2241
2242                 if (!last)
2243                         wr = next;
2244                 else
2245                         last->next = next;
2246                 last = next;
2247
2248                 next->next       = NULL;
2249                 next->wr_id      = user_wr->wr_id;
2250                 next->num_sge    = user_wr->num_sge;
2251
2252                 if (next->num_sge) {
2253                         next->sg_list = (void *)next +
2254                                 ALIGN(sizeof(*next), sizeof(struct ib_sge));
2255                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2256                                            next->num_sge *
2257                                                    sizeof(struct ib_sge))) {
2258                                 ret = -EFAULT;
2259                                 goto err;
2260                         }
2261                         sg_ind += next->num_sge;
2262                 } else
2263                         next->sg_list = NULL;
2264         }
2265
2266         kfree(user_wr);
2267         return wr;
2268
2269 err:
2270         kfree(user_wr);
2271
2272         while (wr) {
2273                 next = wr->next;
2274                 kfree(wr);
2275                 wr = next;
2276         }
2277
2278         return ERR_PTR(ret);
2279 }
2280
2281 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2282 {
2283         struct ib_uverbs_post_recv      cmd;
2284         struct ib_uverbs_post_recv_resp resp;
2285         struct ib_recv_wr              *wr, *next;
2286         const struct ib_recv_wr        *bad_wr;
2287         struct ib_qp                   *qp;
2288         int ret, ret2;
2289         struct uverbs_req_iter iter;
2290
2291         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2292         if (ret)
2293                 return ret;
2294
2295         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2296                                        cmd.sge_count);
2297         if (IS_ERR(wr))
2298                 return PTR_ERR(wr);
2299
2300         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2301         if (!qp) {
2302                 ret = -EINVAL;
2303                 goto out;
2304         }
2305
2306         resp.bad_wr = 0;
2307         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2308
2309         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2310                                 UVERBS_LOOKUP_READ);
2311         if (ret) {
2312                 for (next = wr; next; next = next->next) {
2313                         ++resp.bad_wr;
2314                         if (next == bad_wr)
2315                                 break;
2316                 }
2317         }
2318
2319         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2320         if (ret2)
2321                 ret = ret2;
2322 out:
2323         while (wr) {
2324                 next = wr->next;
2325                 kfree(wr);
2326                 wr = next;
2327         }
2328
2329         return ret;
2330 }
2331
2332 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2333 {
2334         struct ib_uverbs_post_srq_recv      cmd;
2335         struct ib_uverbs_post_srq_recv_resp resp;
2336         struct ib_recv_wr                  *wr, *next;
2337         const struct ib_recv_wr            *bad_wr;
2338         struct ib_srq                      *srq;
2339         int ret, ret2;
2340         struct uverbs_req_iter iter;
2341
2342         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2343         if (ret)
2344                 return ret;
2345
2346         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2347                                        cmd.sge_count);
2348         if (IS_ERR(wr))
2349                 return PTR_ERR(wr);
2350
2351         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2352         if (!srq) {
2353                 ret = -EINVAL;
2354                 goto out;
2355         }
2356
2357         resp.bad_wr = 0;
2358         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2359
2360         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2361                                 UVERBS_LOOKUP_READ);
2362
2363         if (ret)
2364                 for (next = wr; next; next = next->next) {
2365                         ++resp.bad_wr;
2366                         if (next == bad_wr)
2367                                 break;
2368                 }
2369
2370         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2371         if (ret2)
2372                 ret = ret2;
2373
2374 out:
2375         while (wr) {
2376                 next = wr->next;
2377                 kfree(wr);
2378                 wr = next;
2379         }
2380
2381         return ret;
2382 }
2383
2384 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2385 {
2386         struct ib_uverbs_create_ah       cmd;
2387         struct ib_uverbs_create_ah_resp  resp;
2388         struct ib_uobject               *uobj;
2389         struct ib_pd                    *pd;
2390         struct ib_ah                    *ah;
2391         struct rdma_ah_attr             attr = {};
2392         int ret;
2393         struct ib_device *ib_dev;
2394
2395         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2396         if (ret)
2397                 return ret;
2398
2399         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2400         if (IS_ERR(uobj))
2401                 return PTR_ERR(uobj);
2402
2403         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2404                 ret = -EINVAL;
2405                 goto err;
2406         }
2407
2408         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2409         if (!pd) {
2410                 ret = -EINVAL;
2411                 goto err;
2412         }
2413
2414         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2415         rdma_ah_set_make_grd(&attr, false);
2416         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2417         rdma_ah_set_sl(&attr, cmd.attr.sl);
2418         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2419         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2420         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2421
2422         if (cmd.attr.is_global) {
2423                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2424                                 cmd.attr.grh.sgid_index,
2425                                 cmd.attr.grh.hop_limit,
2426                                 cmd.attr.grh.traffic_class);
2427                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2428         } else {
2429                 rdma_ah_set_ah_flags(&attr, 0);
2430         }
2431
2432         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2433         if (IS_ERR(ah)) {
2434                 ret = PTR_ERR(ah);
2435                 goto err_put;
2436         }
2437
2438         ah->uobject  = uobj;
2439         uobj->user_handle = cmd.user_handle;
2440         uobj->object = ah;
2441         uobj_put_obj_read(pd);
2442         uobj_finalize_uobj_create(uobj, attrs);
2443
2444         resp.ah_handle = uobj->id;
2445         return uverbs_response(attrs, &resp, sizeof(resp));
2446
2447 err_put:
2448         uobj_put_obj_read(pd);
2449 err:
2450         uobj_alloc_abort(uobj, attrs);
2451         return ret;
2452 }
2453
2454 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2455 {
2456         struct ib_uverbs_destroy_ah cmd;
2457         int ret;
2458
2459         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2460         if (ret)
2461                 return ret;
2462
2463         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2464 }
2465
2466 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2467 {
2468         struct ib_uverbs_attach_mcast cmd;
2469         struct ib_qp                 *qp;
2470         struct ib_uqp_object         *obj;
2471         struct ib_uverbs_mcast_entry *mcast;
2472         int                           ret;
2473
2474         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2475         if (ret)
2476                 return ret;
2477
2478         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2479         if (!qp)
2480                 return -EINVAL;
2481
2482         obj = qp->uobject;
2483
2484         mutex_lock(&obj->mcast_lock);
2485         list_for_each_entry(mcast, &obj->mcast_list, list)
2486                 if (cmd.mlid == mcast->lid &&
2487                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2488                         ret = 0;
2489                         goto out_put;
2490                 }
2491
2492         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2493         if (!mcast) {
2494                 ret = -ENOMEM;
2495                 goto out_put;
2496         }
2497
2498         mcast->lid = cmd.mlid;
2499         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2500
2501         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2502         if (!ret)
2503                 list_add_tail(&mcast->list, &obj->mcast_list);
2504         else
2505                 kfree(mcast);
2506
2507 out_put:
2508         mutex_unlock(&obj->mcast_lock);
2509         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2510                                 UVERBS_LOOKUP_READ);
2511
2512         return ret;
2513 }
2514
2515 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2516 {
2517         struct ib_uverbs_detach_mcast cmd;
2518         struct ib_uqp_object         *obj;
2519         struct ib_qp                 *qp;
2520         struct ib_uverbs_mcast_entry *mcast;
2521         int                           ret;
2522         bool                          found = false;
2523
2524         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2525         if (ret)
2526                 return ret;
2527
2528         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2529         if (!qp)
2530                 return -EINVAL;
2531
2532         obj = qp->uobject;
2533         mutex_lock(&obj->mcast_lock);
2534
2535         list_for_each_entry(mcast, &obj->mcast_list, list)
2536                 if (cmd.mlid == mcast->lid &&
2537                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2538                         list_del(&mcast->list);
2539                         kfree(mcast);
2540                         found = true;
2541                         break;
2542                 }
2543
2544         if (!found) {
2545                 ret = -EINVAL;
2546                 goto out_put;
2547         }
2548
2549         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2550
2551 out_put:
2552         mutex_unlock(&obj->mcast_lock);
2553         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2554                                 UVERBS_LOOKUP_READ);
2555         return ret;
2556 }
2557
2558 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2559 {
2560         struct ib_uflow_resources *resources;
2561
2562         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2563
2564         if (!resources)
2565                 return NULL;
2566
2567         if (!num_specs)
2568                 goto out;
2569
2570         resources->counters =
2571                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2572         resources->collection =
2573                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2574
2575         if (!resources->counters || !resources->collection)
2576                 goto err;
2577
2578 out:
2579         resources->max = num_specs;
2580         return resources;
2581
2582 err:
2583         kfree(resources->counters);
2584         kfree(resources);
2585
2586         return NULL;
2587 }
2588 EXPORT_SYMBOL(flow_resources_alloc);
2589
2590 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2591 {
2592         unsigned int i;
2593
2594         if (!uflow_res)
2595                 return;
2596
2597         for (i = 0; i < uflow_res->collection_num; i++)
2598                 atomic_dec(&uflow_res->collection[i]->usecnt);
2599
2600         for (i = 0; i < uflow_res->counters_num; i++)
2601                 atomic_dec(&uflow_res->counters[i]->usecnt);
2602
2603         kfree(uflow_res->collection);
2604         kfree(uflow_res->counters);
2605         kfree(uflow_res);
2606 }
2607 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2608
2609 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2610                         enum ib_flow_spec_type type,
2611                         void *ibobj)
2612 {
2613         WARN_ON(uflow_res->num >= uflow_res->max);
2614
2615         switch (type) {
2616         case IB_FLOW_SPEC_ACTION_HANDLE:
2617                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2618                 uflow_res->collection[uflow_res->collection_num++] =
2619                         (struct ib_flow_action *)ibobj;
2620                 break;
2621         case IB_FLOW_SPEC_ACTION_COUNT:
2622                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2623                 uflow_res->counters[uflow_res->counters_num++] =
2624                         (struct ib_counters *)ibobj;
2625                 break;
2626         default:
2627                 WARN_ON(1);
2628         }
2629
2630         uflow_res->num++;
2631 }
2632 EXPORT_SYMBOL(flow_resources_add);
2633
2634 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2635                                        struct ib_uverbs_flow_spec *kern_spec,
2636                                        union ib_flow_spec *ib_spec,
2637                                        struct ib_uflow_resources *uflow_res)
2638 {
2639         ib_spec->type = kern_spec->type;
2640         switch (ib_spec->type) {
2641         case IB_FLOW_SPEC_ACTION_TAG:
2642                 if (kern_spec->flow_tag.size !=
2643                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2644                         return -EINVAL;
2645
2646                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2647                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2648                 break;
2649         case IB_FLOW_SPEC_ACTION_DROP:
2650                 if (kern_spec->drop.size !=
2651                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2652                         return -EINVAL;
2653
2654                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2655                 break;
2656         case IB_FLOW_SPEC_ACTION_HANDLE:
2657                 if (kern_spec->action.size !=
2658                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2659                         return -EOPNOTSUPP;
2660                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2661                                                         UVERBS_OBJECT_FLOW_ACTION,
2662                                                         kern_spec->action.handle,
2663                                                         attrs);
2664                 if (!ib_spec->action.act)
2665                         return -EINVAL;
2666                 ib_spec->action.size =
2667                         sizeof(struct ib_flow_spec_action_handle);
2668                 flow_resources_add(uflow_res,
2669                                    IB_FLOW_SPEC_ACTION_HANDLE,
2670                                    ib_spec->action.act);
2671                 uobj_put_obj_read(ib_spec->action.act);
2672                 break;
2673         case IB_FLOW_SPEC_ACTION_COUNT:
2674                 if (kern_spec->flow_count.size !=
2675                         sizeof(struct ib_uverbs_flow_spec_action_count))
2676                         return -EINVAL;
2677                 ib_spec->flow_count.counters =
2678                         uobj_get_obj_read(counters,
2679                                           UVERBS_OBJECT_COUNTERS,
2680                                           kern_spec->flow_count.handle,
2681                                           attrs);
2682                 if (!ib_spec->flow_count.counters)
2683                         return -EINVAL;
2684                 ib_spec->flow_count.size =
2685                                 sizeof(struct ib_flow_spec_action_count);
2686                 flow_resources_add(uflow_res,
2687                                    IB_FLOW_SPEC_ACTION_COUNT,
2688                                    ib_spec->flow_count.counters);
2689                 uobj_put_obj_read(ib_spec->flow_count.counters);
2690                 break;
2691         default:
2692                 return -EINVAL;
2693         }
2694         return 0;
2695 }
2696
2697 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2698                                 u16 ib_real_filter_sz)
2699 {
2700         /*
2701          * User space filter structures must be 64 bit aligned, otherwise this
2702          * may pass, but we won't handle additional new attributes.
2703          */
2704
2705         if (kern_filter_size > ib_real_filter_sz) {
2706                 if (memchr_inv(kern_spec_filter +
2707                                ib_real_filter_sz, 0,
2708                                kern_filter_size - ib_real_filter_sz))
2709                         return -EINVAL;
2710                 return ib_real_filter_sz;
2711         }
2712         return kern_filter_size;
2713 }
2714
2715 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2716                                           const void *kern_spec_mask,
2717                                           const void *kern_spec_val,
2718                                           size_t kern_filter_sz,
2719                                           union ib_flow_spec *ib_spec)
2720 {
2721         ssize_t actual_filter_sz;
2722         ssize_t ib_filter_sz;
2723
2724         /* User flow spec size must be aligned to 4 bytes */
2725         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2726                 return -EINVAL;
2727
2728         ib_spec->type = type;
2729
2730         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2731                 return -EINVAL;
2732
2733         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2734         case IB_FLOW_SPEC_ETH:
2735                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2736                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2737                                                     kern_filter_sz,
2738                                                     ib_filter_sz);
2739                 if (actual_filter_sz <= 0)
2740                         return -EINVAL;
2741                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2742                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2743                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2744                 break;
2745         case IB_FLOW_SPEC_IPV4:
2746                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2747                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2748                                                     kern_filter_sz,
2749                                                     ib_filter_sz);
2750                 if (actual_filter_sz <= 0)
2751                         return -EINVAL;
2752                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2753                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2754                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2755                 break;
2756         case IB_FLOW_SPEC_IPV6:
2757                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2758                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2759                                                     kern_filter_sz,
2760                                                     ib_filter_sz);
2761                 if (actual_filter_sz <= 0)
2762                         return -EINVAL;
2763                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2764                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2765                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2766
2767                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2768                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2769                         return -EINVAL;
2770                 break;
2771         case IB_FLOW_SPEC_TCP:
2772         case IB_FLOW_SPEC_UDP:
2773                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2774                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2775                                                     kern_filter_sz,
2776                                                     ib_filter_sz);
2777                 if (actual_filter_sz <= 0)
2778                         return -EINVAL;
2779                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2780                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2781                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2782                 break;
2783         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2784                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2785                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2786                                                     kern_filter_sz,
2787                                                     ib_filter_sz);
2788                 if (actual_filter_sz <= 0)
2789                         return -EINVAL;
2790                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2791                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2792                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2793
2794                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2795                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2796                         return -EINVAL;
2797                 break;
2798         case IB_FLOW_SPEC_ESP:
2799                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2800                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2801                                                     kern_filter_sz,
2802                                                     ib_filter_sz);
2803                 if (actual_filter_sz <= 0)
2804                         return -EINVAL;
2805                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2806                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2807                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2808                 break;
2809         case IB_FLOW_SPEC_GRE:
2810                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2811                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2812                                                     kern_filter_sz,
2813                                                     ib_filter_sz);
2814                 if (actual_filter_sz <= 0)
2815                         return -EINVAL;
2816                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2817                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2818                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2819                 break;
2820         case IB_FLOW_SPEC_MPLS:
2821                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2822                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2823                                                     kern_filter_sz,
2824                                                     ib_filter_sz);
2825                 if (actual_filter_sz <= 0)
2826                         return -EINVAL;
2827                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2828                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2829                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2830                 break;
2831         default:
2832                 return -EINVAL;
2833         }
2834         return 0;
2835 }
2836
2837 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2838                                        union ib_flow_spec *ib_spec)
2839 {
2840         size_t kern_filter_sz;
2841         void *kern_spec_mask;
2842         void *kern_spec_val;
2843
2844         if (check_sub_overflow((size_t)kern_spec->hdr.size,
2845                                sizeof(struct ib_uverbs_flow_spec_hdr),
2846                                &kern_filter_sz))
2847                 return -EINVAL;
2848
2849         kern_filter_sz /= 2;
2850
2851         kern_spec_val = (void *)kern_spec +
2852                 sizeof(struct ib_uverbs_flow_spec_hdr);
2853         kern_spec_mask = kern_spec_val + kern_filter_sz;
2854
2855         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2856                                                      kern_spec_mask,
2857                                                      kern_spec_val,
2858                                                      kern_filter_sz, ib_spec);
2859 }
2860
2861 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2862                                 struct ib_uverbs_flow_spec *kern_spec,
2863                                 union ib_flow_spec *ib_spec,
2864                                 struct ib_uflow_resources *uflow_res)
2865 {
2866         if (kern_spec->reserved)
2867                 return -EINVAL;
2868
2869         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2870                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2871                                                    uflow_res);
2872         else
2873                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2874 }
2875
2876 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2877 {
2878         struct ib_uverbs_ex_create_wq cmd;
2879         struct ib_uverbs_ex_create_wq_resp resp = {};
2880         struct ib_uwq_object           *obj;
2881         int err = 0;
2882         struct ib_cq *cq;
2883         struct ib_pd *pd;
2884         struct ib_wq *wq;
2885         struct ib_wq_init_attr wq_init_attr = {};
2886         struct ib_device *ib_dev;
2887
2888         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2889         if (err)
2890                 return err;
2891
2892         if (cmd.comp_mask)
2893                 return -EOPNOTSUPP;
2894
2895         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2896                                                  &ib_dev);
2897         if (IS_ERR(obj))
2898                 return PTR_ERR(obj);
2899
2900         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2901         if (!pd) {
2902                 err = -EINVAL;
2903                 goto err_uobj;
2904         }
2905
2906         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2907         if (!cq) {
2908                 err = -EINVAL;
2909                 goto err_put_pd;
2910         }
2911
2912         wq_init_attr.cq = cq;
2913         wq_init_attr.max_sge = cmd.max_sge;
2914         wq_init_attr.max_wr = cmd.max_wr;
2915         wq_init_attr.wq_type = cmd.wq_type;
2916         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2917         wq_init_attr.create_flags = cmd.create_flags;
2918         INIT_LIST_HEAD(&obj->uevent.event_list);
2919         obj->uevent.uobject.user_handle = cmd.user_handle;
2920
2921         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2922         if (IS_ERR(wq)) {
2923                 err = PTR_ERR(wq);
2924                 goto err_put_cq;
2925         }
2926
2927         wq->uobject = obj;
2928         obj->uevent.uobject.object = wq;
2929         wq->wq_type = wq_init_attr.wq_type;
2930         wq->cq = cq;
2931         wq->pd = pd;
2932         wq->device = pd->device;
2933         atomic_set(&wq->usecnt, 0);
2934         atomic_inc(&pd->usecnt);
2935         atomic_inc(&cq->usecnt);
2936         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2937         if (obj->uevent.event_file)
2938                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2939
2940         uobj_put_obj_read(pd);
2941         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2942                                 UVERBS_LOOKUP_READ);
2943         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2944
2945         resp.wq_handle = obj->uevent.uobject.id;
2946         resp.max_sge = wq_init_attr.max_sge;
2947         resp.max_wr = wq_init_attr.max_wr;
2948         resp.wqn = wq->wq_num;
2949         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2950         return uverbs_response(attrs, &resp, sizeof(resp));
2951
2952 err_put_cq:
2953         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2954                                 UVERBS_LOOKUP_READ);
2955 err_put_pd:
2956         uobj_put_obj_read(pd);
2957 err_uobj:
2958         uobj_alloc_abort(&obj->uevent.uobject, attrs);
2959
2960         return err;
2961 }
2962
2963 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2964 {
2965         struct ib_uverbs_ex_destroy_wq  cmd;
2966         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2967         struct ib_uobject               *uobj;
2968         struct ib_uwq_object            *obj;
2969         int                             ret;
2970
2971         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2972         if (ret)
2973                 return ret;
2974
2975         if (cmd.comp_mask)
2976                 return -EOPNOTSUPP;
2977
2978         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2979         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2980         if (IS_ERR(uobj))
2981                 return PTR_ERR(uobj);
2982
2983         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2984         resp.events_reported = obj->uevent.events_reported;
2985
2986         uobj_put_destroy(uobj);
2987
2988         return uverbs_response(attrs, &resp, sizeof(resp));
2989 }
2990
2991 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2992 {
2993         struct ib_uverbs_ex_modify_wq cmd;
2994         struct ib_wq *wq;
2995         struct ib_wq_attr wq_attr = {};
2996         int ret;
2997
2998         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2999         if (ret)
3000                 return ret;
3001
3002         if (!cmd.attr_mask)
3003                 return -EINVAL;
3004
3005         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3006                 return -EINVAL;
3007
3008         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3009         if (!wq)
3010                 return -EINVAL;
3011
3012         if (cmd.attr_mask & IB_WQ_FLAGS) {
3013                 wq_attr.flags = cmd.flags;
3014                 wq_attr.flags_mask = cmd.flags_mask;
3015         }
3016
3017         if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3018                 if (cmd.curr_wq_state > IB_WQS_ERR)
3019                         return -EINVAL;
3020
3021                 wq_attr.curr_wq_state = cmd.curr_wq_state;
3022         } else {
3023                 wq_attr.curr_wq_state = wq->state;
3024         }
3025
3026         if (cmd.attr_mask & IB_WQ_STATE) {
3027                 if (cmd.wq_state > IB_WQS_ERR)
3028                         return -EINVAL;
3029
3030                 wq_attr.wq_state = cmd.wq_state;
3031         } else {
3032                 wq_attr.wq_state = wq_attr.curr_wq_state;
3033         }
3034
3035         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3036                                         &attrs->driver_udata);
3037         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3038                                 UVERBS_LOOKUP_READ);
3039         return ret;
3040 }
3041
3042 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3043 {
3044         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3045         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3046         struct ib_uobject *uobj;
3047         int err;
3048         struct ib_rwq_ind_table_init_attr init_attr = {};
3049         struct ib_rwq_ind_table *rwq_ind_tbl;
3050         struct ib_wq **wqs = NULL;
3051         u32 *wqs_handles = NULL;
3052         struct ib_wq    *wq = NULL;
3053         int i, num_read_wqs;
3054         u32 num_wq_handles;
3055         struct uverbs_req_iter iter;
3056         struct ib_device *ib_dev;
3057
3058         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3059         if (err)
3060                 return err;
3061
3062         if (cmd.comp_mask)
3063                 return -EOPNOTSUPP;
3064
3065         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3066                 return -EINVAL;
3067
3068         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3069         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3070                               GFP_KERNEL);
3071         if (!wqs_handles)
3072                 return -ENOMEM;
3073
3074         err = uverbs_request_next(&iter, wqs_handles,
3075                                   num_wq_handles * sizeof(__u32));
3076         if (err)
3077                 goto err_free;
3078
3079         err = uverbs_request_finish(&iter);
3080         if (err)
3081                 goto err_free;
3082
3083         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3084         if (!wqs) {
3085                 err = -ENOMEM;
3086                 goto  err_free;
3087         }
3088
3089         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3090                         num_read_wqs++) {
3091                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3092                                        wqs_handles[num_read_wqs], attrs);
3093                 if (!wq) {
3094                         err = -EINVAL;
3095                         goto put_wqs;
3096                 }
3097
3098                 wqs[num_read_wqs] = wq;
3099                 atomic_inc(&wqs[num_read_wqs]->usecnt);
3100         }
3101
3102         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3103         if (IS_ERR(uobj)) {
3104                 err = PTR_ERR(uobj);
3105                 goto put_wqs;
3106         }
3107
3108         rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3109         if (!rwq_ind_tbl) {
3110                 err = -ENOMEM;
3111                 goto err_uobj;
3112         }
3113
3114         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3115         init_attr.ind_tbl = wqs;
3116
3117         rwq_ind_tbl->ind_tbl = wqs;
3118         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3119         rwq_ind_tbl->uobject = uobj;
3120         uobj->object = rwq_ind_tbl;
3121         rwq_ind_tbl->device = ib_dev;
3122         atomic_set(&rwq_ind_tbl->usecnt, 0);
3123
3124         err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3125                                                &attrs->driver_udata);
3126         if (err)
3127                 goto err_create;
3128
3129         for (i = 0; i < num_wq_handles; i++)
3130                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3131                                         UVERBS_LOOKUP_READ);
3132         kfree(wqs_handles);
3133         uobj_finalize_uobj_create(uobj, attrs);
3134
3135         resp.ind_tbl_handle = uobj->id;
3136         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3137         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3138         return uverbs_response(attrs, &resp, sizeof(resp));
3139
3140 err_create:
3141         kfree(rwq_ind_tbl);
3142 err_uobj:
3143         uobj_alloc_abort(uobj, attrs);
3144 put_wqs:
3145         for (i = 0; i < num_read_wqs; i++) {
3146                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3147                                         UVERBS_LOOKUP_READ);
3148                 atomic_dec(&wqs[i]->usecnt);
3149         }
3150 err_free:
3151         kfree(wqs_handles);
3152         kfree(wqs);
3153         return err;
3154 }
3155
3156 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3157 {
3158         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3159         int ret;
3160
3161         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3162         if (ret)
3163                 return ret;
3164
3165         if (cmd.comp_mask)
3166                 return -EOPNOTSUPP;
3167
3168         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3169                                     cmd.ind_tbl_handle, attrs);
3170 }
3171
3172 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3173 {
3174         struct ib_uverbs_create_flow      cmd;
3175         struct ib_uverbs_create_flow_resp resp = {};
3176         struct ib_uobject                 *uobj;
3177         struct ib_flow                    *flow_id;
3178         struct ib_uverbs_flow_attr        *kern_flow_attr;
3179         struct ib_flow_attr               *flow_attr;
3180         struct ib_qp                      *qp;
3181         struct ib_uflow_resources         *uflow_res;
3182         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3183         struct uverbs_req_iter iter;
3184         int err;
3185         void *ib_spec;
3186         int i;
3187         struct ib_device *ib_dev;
3188
3189         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3190         if (err)
3191                 return err;
3192
3193         if (cmd.comp_mask)
3194                 return -EINVAL;
3195
3196         if (!capable(CAP_NET_RAW))
3197                 return -EPERM;
3198
3199         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3200                 return -EINVAL;
3201
3202         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3203             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3204              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3205                 return -EINVAL;
3206
3207         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3208                 return -EINVAL;
3209
3210         if (cmd.flow_attr.size >
3211             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3212                 return -EINVAL;
3213
3214         if (cmd.flow_attr.reserved[0] ||
3215             cmd.flow_attr.reserved[1])
3216                 return -EINVAL;
3217
3218         if (cmd.flow_attr.num_of_specs) {
3219                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3220                                          GFP_KERNEL);
3221                 if (!kern_flow_attr)
3222                         return -ENOMEM;
3223
3224                 *kern_flow_attr = cmd.flow_attr;
3225                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3226                                           cmd.flow_attr.size);
3227                 if (err)
3228                         goto err_free_attr;
3229         } else {
3230                 kern_flow_attr = &cmd.flow_attr;
3231         }
3232
3233         err = uverbs_request_finish(&iter);
3234         if (err)
3235                 goto err_free_attr;
3236
3237         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3238         if (IS_ERR(uobj)) {
3239                 err = PTR_ERR(uobj);
3240                 goto err_free_attr;
3241         }
3242
3243         if (!rdma_is_port_valid(uobj->context->device, cmd.flow_attr.port)) {
3244                 err = -EINVAL;
3245                 goto err_uobj;
3246         }
3247
3248         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3249         if (!qp) {
3250                 err = -EINVAL;
3251                 goto err_uobj;
3252         }
3253
3254         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3255                 err = -EINVAL;
3256                 goto err_put;
3257         }
3258
3259         flow_attr = kzalloc(struct_size(flow_attr, flows,
3260                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3261         if (!flow_attr) {
3262                 err = -ENOMEM;
3263                 goto err_put;
3264         }
3265         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3266         if (!uflow_res) {
3267                 err = -ENOMEM;
3268                 goto err_free_flow_attr;
3269         }
3270
3271         flow_attr->type = kern_flow_attr->type;
3272         flow_attr->priority = kern_flow_attr->priority;
3273         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3274         flow_attr->port = kern_flow_attr->port;
3275         flow_attr->flags = kern_flow_attr->flags;
3276         flow_attr->size = sizeof(*flow_attr);
3277
3278         kern_spec = kern_flow_attr->flow_specs;
3279         ib_spec = flow_attr + 1;
3280         for (i = 0; i < flow_attr->num_of_specs &&
3281                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3282                         cmd.flow_attr.size >= kern_spec->size;
3283              i++) {
3284                 err = kern_spec_to_ib_spec(
3285                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3286                                 ib_spec, uflow_res);
3287                 if (err)
3288                         goto err_free;
3289
3290                 flow_attr->size +=
3291                         ((union ib_flow_spec *) ib_spec)->size;
3292                 cmd.flow_attr.size -= kern_spec->size;
3293                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3294                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3295         }
3296         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3297                 pr_warn("create flow failed, flow %d: %u bytes left from uverb cmd\n",
3298                         i, cmd.flow_attr.size);
3299                 err = -EINVAL;
3300                 goto err_free;
3301         }
3302
3303         flow_id = qp->device->ops.create_flow(qp, flow_attr,
3304                                               &attrs->driver_udata);
3305
3306         if (IS_ERR(flow_id)) {
3307                 err = PTR_ERR(flow_id);
3308                 goto err_free;
3309         }
3310
3311         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3312
3313         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3314                                 UVERBS_LOOKUP_READ);
3315         kfree(flow_attr);
3316
3317         if (cmd.flow_attr.num_of_specs)
3318                 kfree(kern_flow_attr);
3319         uobj_finalize_uobj_create(uobj, attrs);
3320
3321         resp.flow_handle = uobj->id;
3322         return uverbs_response(attrs, &resp, sizeof(resp));
3323
3324 err_free:
3325         ib_uverbs_flow_resources_free(uflow_res);
3326 err_free_flow_attr:
3327         kfree(flow_attr);
3328 err_put:
3329         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3330                                 UVERBS_LOOKUP_READ);
3331 err_uobj:
3332         uobj_alloc_abort(uobj, attrs);
3333 err_free_attr:
3334         if (cmd.flow_attr.num_of_specs)
3335                 kfree(kern_flow_attr);
3336         return err;
3337 }
3338
3339 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3340 {
3341         struct ib_uverbs_destroy_flow   cmd;
3342         int                             ret;
3343
3344         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3345         if (ret)
3346                 return ret;
3347
3348         if (cmd.comp_mask)
3349                 return -EINVAL;
3350
3351         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3352 }
3353
3354 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3355                                 struct ib_uverbs_create_xsrq *cmd,
3356                                 struct ib_udata *udata)
3357 {
3358         struct ib_uverbs_create_srq_resp resp = {};
3359         struct ib_usrq_object           *obj;
3360         struct ib_pd                    *pd;
3361         struct ib_srq                   *srq;
3362         struct ib_srq_init_attr          attr;
3363         int ret;
3364         struct ib_uobject *xrcd_uobj;
3365         struct ib_device *ib_dev;
3366
3367         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3368                                                   &ib_dev);
3369         if (IS_ERR(obj))
3370                 return PTR_ERR(obj);
3371
3372         if (cmd->srq_type == IB_SRQT_TM)
3373                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3374
3375         if (cmd->srq_type == IB_SRQT_XRC) {
3376                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3377                                           attrs);
3378                 if (IS_ERR(xrcd_uobj)) {
3379                         ret = -EINVAL;
3380                         goto err;
3381                 }
3382
3383                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3384                 if (!attr.ext.xrc.xrcd) {
3385                         ret = -EINVAL;
3386                         goto err_put_xrcd;
3387                 }
3388
3389                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3390                 atomic_inc(&obj->uxrcd->refcnt);
3391         }
3392
3393         if (ib_srq_has_cq(cmd->srq_type)) {
3394                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3395                                                 cmd->cq_handle, attrs);
3396                 if (!attr.ext.cq) {
3397                         ret = -EINVAL;
3398                         goto err_put_xrcd;
3399                 }
3400         }
3401
3402         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3403         if (!pd) {
3404                 ret = -EINVAL;
3405                 goto err_put_cq;
3406         }
3407
3408         attr.event_handler  = ib_uverbs_srq_event_handler;
3409         attr.srq_type       = cmd->srq_type;
3410         attr.attr.max_wr    = cmd->max_wr;
3411         attr.attr.max_sge   = cmd->max_sge;
3412         attr.attr.srq_limit = cmd->srq_limit;
3413
3414         INIT_LIST_HEAD(&obj->uevent.event_list);
3415         obj->uevent.uobject.user_handle = cmd->user_handle;
3416
3417         srq = ib_create_srq_user(pd, &attr, obj, udata);
3418         if (IS_ERR(srq)) {
3419                 ret = PTR_ERR(srq);
3420                 goto err_put_pd;
3421         }
3422
3423         obj->uevent.uobject.object = srq;
3424         obj->uevent.uobject.user_handle = cmd->user_handle;
3425         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3426         if (obj->uevent.event_file)
3427                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3428
3429         if (cmd->srq_type == IB_SRQT_XRC)
3430                 resp.srqn = srq->ext.xrc.srq_num;
3431
3432         if (cmd->srq_type == IB_SRQT_XRC)
3433                 uobj_put_read(xrcd_uobj);
3434
3435         if (ib_srq_has_cq(cmd->srq_type))
3436                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3437                                         UVERBS_LOOKUP_READ);
3438
3439         uobj_put_obj_read(pd);
3440         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3441
3442         resp.srq_handle = obj->uevent.uobject.id;
3443         resp.max_wr = attr.attr.max_wr;
3444         resp.max_sge = attr.attr.max_sge;
3445         return uverbs_response(attrs, &resp, sizeof(resp));
3446
3447 err_put_pd:
3448         uobj_put_obj_read(pd);
3449 err_put_cq:
3450         if (ib_srq_has_cq(cmd->srq_type))
3451                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3452                                         UVERBS_LOOKUP_READ);
3453
3454 err_put_xrcd:
3455         if (cmd->srq_type == IB_SRQT_XRC) {
3456                 atomic_dec(&obj->uxrcd->refcnt);
3457                 uobj_put_read(xrcd_uobj);
3458         }
3459
3460 err:
3461         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3462         return ret;
3463 }
3464
3465 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3466 {
3467         struct ib_uverbs_create_srq      cmd;
3468         struct ib_uverbs_create_xsrq     xcmd;
3469         int ret;
3470
3471         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3472         if (ret)
3473                 return ret;
3474
3475         memset(&xcmd, 0, sizeof(xcmd));
3476         xcmd.response    = cmd.response;
3477         xcmd.user_handle = cmd.user_handle;
3478         xcmd.srq_type    = IB_SRQT_BASIC;
3479         xcmd.pd_handle   = cmd.pd_handle;
3480         xcmd.max_wr      = cmd.max_wr;
3481         xcmd.max_sge     = cmd.max_sge;
3482         xcmd.srq_limit   = cmd.srq_limit;
3483
3484         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3485 }
3486
3487 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3488 {
3489         struct ib_uverbs_create_xsrq     cmd;
3490         int ret;
3491
3492         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3493         if (ret)
3494                 return ret;
3495
3496         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3497 }
3498
3499 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3500 {
3501         struct ib_uverbs_modify_srq cmd;
3502         struct ib_srq              *srq;
3503         struct ib_srq_attr          attr;
3504         int                         ret;
3505
3506         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3507         if (ret)
3508                 return ret;
3509
3510         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3511         if (!srq)
3512                 return -EINVAL;
3513
3514         attr.max_wr    = cmd.max_wr;
3515         attr.srq_limit = cmd.srq_limit;
3516
3517         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3518                                           &attrs->driver_udata);
3519
3520         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3521                                 UVERBS_LOOKUP_READ);
3522
3523         return ret;
3524 }
3525
3526 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3527 {
3528         struct ib_uverbs_query_srq      cmd;
3529         struct ib_uverbs_query_srq_resp resp;
3530         struct ib_srq_attr              attr;
3531         struct ib_srq                   *srq;
3532         int                             ret;
3533
3534         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3535         if (ret)
3536                 return ret;
3537
3538         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3539         if (!srq)
3540                 return -EINVAL;
3541
3542         ret = ib_query_srq(srq, &attr);
3543
3544         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3545                                 UVERBS_LOOKUP_READ);
3546
3547         if (ret)
3548                 return ret;
3549
3550         memset(&resp, 0, sizeof resp);
3551
3552         resp.max_wr    = attr.max_wr;
3553         resp.max_sge   = attr.max_sge;
3554         resp.srq_limit = attr.srq_limit;
3555
3556         return uverbs_response(attrs, &resp, sizeof(resp));
3557 }
3558
3559 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3560 {
3561         struct ib_uverbs_destroy_srq      cmd;
3562         struct ib_uverbs_destroy_srq_resp resp;
3563         struct ib_uobject                *uobj;
3564         struct ib_uevent_object          *obj;
3565         int ret;
3566
3567         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3568         if (ret)
3569                 return ret;
3570
3571         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3572         if (IS_ERR(uobj))
3573                 return PTR_ERR(uobj);
3574
3575         obj = container_of(uobj, struct ib_uevent_object, uobject);
3576         memset(&resp, 0, sizeof(resp));
3577         resp.events_reported = obj->events_reported;
3578
3579         uobj_put_destroy(uobj);
3580
3581         return uverbs_response(attrs, &resp, sizeof(resp));
3582 }
3583
3584 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3585 {
3586         struct ib_uverbs_ex_query_device_resp resp = {};
3587         struct ib_uverbs_ex_query_device  cmd;
3588         struct ib_device_attr attr = {0};
3589         struct ib_ucontext *ucontext;
3590         struct ib_device *ib_dev;
3591         int err;
3592
3593         ucontext = ib_uverbs_get_ucontext(attrs);
3594         if (IS_ERR(ucontext))
3595                 return PTR_ERR(ucontext);
3596         ib_dev = ucontext->device;
3597
3598         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3599         if (err)
3600                 return err;
3601
3602         if (cmd.comp_mask)
3603                 return -EINVAL;
3604
3605         if (cmd.reserved)
3606                 return -EINVAL;
3607
3608         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3609         if (err)
3610                 return err;
3611
3612         copy_query_dev_fields(ucontext, &resp.base, &attr);
3613
3614         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3615         resp.odp_caps.per_transport_caps.rc_odp_caps =
3616                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3617         resp.odp_caps.per_transport_caps.uc_odp_caps =
3618                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3619         resp.odp_caps.per_transport_caps.ud_odp_caps =
3620                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3621         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3622
3623         resp.timestamp_mask = attr.timestamp_mask;
3624         resp.hca_core_clock = attr.hca_core_clock;
3625         resp.device_cap_flags_ex = attr.device_cap_flags;
3626         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3627         resp.rss_caps.max_rwq_indirection_tables =
3628                 attr.rss_caps.max_rwq_indirection_tables;
3629         resp.rss_caps.max_rwq_indirection_table_size =
3630                 attr.rss_caps.max_rwq_indirection_table_size;
3631         resp.max_wq_type_rq = attr.max_wq_type_rq;
3632         resp.raw_packet_caps = attr.raw_packet_caps;
3633         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3634         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3635         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3636         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3637         resp.tm_caps.flags              = attr.tm_caps.flags;
3638         resp.cq_moderation_caps.max_cq_moderation_count  =
3639                 attr.cq_caps.max_cq_moderation_count;
3640         resp.cq_moderation_caps.max_cq_moderation_period =
3641                 attr.cq_caps.max_cq_moderation_period;
3642         resp.max_dm_size = attr.max_dm_size;
3643         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3644
3645         return uverbs_response(attrs, &resp, sizeof(resp));
3646 }
3647
3648 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3649 {
3650         struct ib_uverbs_ex_modify_cq cmd;
3651         struct ib_cq *cq;
3652         int ret;
3653
3654         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3655         if (ret)
3656                 return ret;
3657
3658         if (!cmd.attr_mask || cmd.reserved)
3659                 return -EINVAL;
3660
3661         if (cmd.attr_mask > IB_CQ_MODERATE)
3662                 return -EOPNOTSUPP;
3663
3664         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3665         if (!cq)
3666                 return -EINVAL;
3667
3668         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3669
3670         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3671                                 UVERBS_LOOKUP_READ);
3672         return ret;
3673 }
3674
3675 /*
3676  * Describe the input structs for write(). Some write methods have an input
3677  * only struct, most have an input and output. If the struct has an output then
3678  * the 'response' u64 must be the first field in the request structure.
3679  *
3680  * If udata is present then both the request and response structs have a
3681  * trailing driver_data flex array. In this case the size of the base struct
3682  * cannot be changed.
3683  */
3684 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3685         .write.has_resp = 1 +                                                  \
3686                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3687                           BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3688                                             sizeof(u64)),                      \
3689         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3690
3691 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3692
3693 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3694         UAPI_DEF_WRITE_IO(req, resp),                                          \
3695                 .write.has_udata =                                             \
3696                         1 +                                                    \
3697                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3698                                           sizeof(req)) +                       \
3699                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3700                                           sizeof(resp))
3701
3702 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3703         UAPI_DEF_WRITE_I(req),                                                 \
3704                 .write.has_udata =                                             \
3705                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3706                                               sizeof(req))
3707
3708 /*
3709  * The _EX versions are for use with WRITE_EX and allow the last struct member
3710  * to be specified. Buffers that do not include that member will be rejected.
3711  */
3712 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3713         .write.has_resp = 1,                                                   \
3714         .write.req_size = offsetofend(req, req_last_member),                   \
3715         .write.resp_size = offsetofend(resp, resp_last_member)
3716
3717 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3718         .write.req_size = offsetofend(req, req_last_member)
3719
3720 const struct uapi_definition uverbs_def_write_intf[] = {
3721         DECLARE_UVERBS_OBJECT(
3722                 UVERBS_OBJECT_AH,
3723                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3724                                      ib_uverbs_create_ah,
3725                                      UAPI_DEF_WRITE_UDATA_IO(
3726                                              struct ib_uverbs_create_ah,
3727                                              struct ib_uverbs_create_ah_resp)),
3728                 DECLARE_UVERBS_WRITE(
3729                         IB_USER_VERBS_CMD_DESTROY_AH,
3730                         ib_uverbs_destroy_ah,
3731                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah)),
3732                 UAPI_DEF_OBJ_NEEDS_FN(create_user_ah),
3733                 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
3734
3735         DECLARE_UVERBS_OBJECT(
3736                 UVERBS_OBJECT_COMP_CHANNEL,
3737                 DECLARE_UVERBS_WRITE(
3738                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3739                         ib_uverbs_create_comp_channel,
3740                         UAPI_DEF_WRITE_IO(
3741                                 struct ib_uverbs_create_comp_channel,
3742                                 struct ib_uverbs_create_comp_channel_resp))),
3743
3744         DECLARE_UVERBS_OBJECT(
3745                 UVERBS_OBJECT_CQ,
3746                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3747                                      ib_uverbs_create_cq,
3748                                      UAPI_DEF_WRITE_UDATA_IO(
3749                                              struct ib_uverbs_create_cq,
3750                                              struct ib_uverbs_create_cq_resp),
3751                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3752                 DECLARE_UVERBS_WRITE(
3753                         IB_USER_VERBS_CMD_DESTROY_CQ,
3754                         ib_uverbs_destroy_cq,
3755                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3756                                           struct ib_uverbs_destroy_cq_resp),
3757                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3758                 DECLARE_UVERBS_WRITE(
3759                         IB_USER_VERBS_CMD_POLL_CQ,
3760                         ib_uverbs_poll_cq,
3761                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3762                                           struct ib_uverbs_poll_cq_resp),
3763                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3764                 DECLARE_UVERBS_WRITE(
3765                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3766                         ib_uverbs_req_notify_cq,
3767                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3768                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3769                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3770                                      ib_uverbs_resize_cq,
3771                                      UAPI_DEF_WRITE_UDATA_IO(
3772                                              struct ib_uverbs_resize_cq,
3773                                              struct ib_uverbs_resize_cq_resp),
3774                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3775                 DECLARE_UVERBS_WRITE_EX(
3776                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3777                         ib_uverbs_ex_create_cq,
3778                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3779                                              reserved,
3780                                              struct ib_uverbs_ex_create_cq_resp,
3781                                              response_length),
3782                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3783                 DECLARE_UVERBS_WRITE_EX(
3784                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3785                         ib_uverbs_ex_modify_cq,
3786                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3787                         UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3788
3789         DECLARE_UVERBS_OBJECT(
3790                 UVERBS_OBJECT_DEVICE,
3791                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3792                                      ib_uverbs_get_context,
3793                                      UAPI_DEF_WRITE_UDATA_IO(
3794                                              struct ib_uverbs_get_context,
3795                                              struct ib_uverbs_get_context_resp)),
3796                 DECLARE_UVERBS_WRITE(
3797                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3798                         ib_uverbs_query_device,
3799                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3800                                           struct ib_uverbs_query_device_resp)),
3801                 DECLARE_UVERBS_WRITE(
3802                         IB_USER_VERBS_CMD_QUERY_PORT,
3803                         ib_uverbs_query_port,
3804                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3805                                           struct ib_uverbs_query_port_resp),
3806                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3807                 DECLARE_UVERBS_WRITE_EX(
3808                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3809                         ib_uverbs_ex_query_device,
3810                         UAPI_DEF_WRITE_IO_EX(
3811                                 struct ib_uverbs_ex_query_device,
3812                                 reserved,
3813                                 struct ib_uverbs_ex_query_device_resp,
3814                                 response_length),
3815                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3816                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3817                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3818
3819         DECLARE_UVERBS_OBJECT(
3820                 UVERBS_OBJECT_FLOW,
3821                 DECLARE_UVERBS_WRITE_EX(
3822                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3823                         ib_uverbs_ex_create_flow,
3824                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3825                                              flow_attr,
3826                                              struct ib_uverbs_create_flow_resp,
3827                                              flow_handle),
3828                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3829                 DECLARE_UVERBS_WRITE_EX(
3830                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3831                         ib_uverbs_ex_destroy_flow,
3832                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3833                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3834
3835         DECLARE_UVERBS_OBJECT(
3836                 UVERBS_OBJECT_MR,
3837                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3838                                      ib_uverbs_dereg_mr,
3839                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3840                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3841                 DECLARE_UVERBS_WRITE(
3842                         IB_USER_VERBS_CMD_REG_MR,
3843                         ib_uverbs_reg_mr,
3844                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3845                                                 struct ib_uverbs_reg_mr_resp),
3846                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3847                 DECLARE_UVERBS_WRITE(
3848                         IB_USER_VERBS_CMD_REREG_MR,
3849                         ib_uverbs_rereg_mr,
3850                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3851                                                 struct ib_uverbs_rereg_mr_resp),
3852                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3853
3854         DECLARE_UVERBS_OBJECT(
3855                 UVERBS_OBJECT_MW,
3856                 DECLARE_UVERBS_WRITE(
3857                         IB_USER_VERBS_CMD_ALLOC_MW,
3858                         ib_uverbs_alloc_mw,
3859                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3860                                                 struct ib_uverbs_alloc_mw_resp),
3861                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3862                 DECLARE_UVERBS_WRITE(
3863                         IB_USER_VERBS_CMD_DEALLOC_MW,
3864                         ib_uverbs_dealloc_mw,
3865                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3866                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3867
3868         DECLARE_UVERBS_OBJECT(
3869                 UVERBS_OBJECT_PD,
3870                 DECLARE_UVERBS_WRITE(
3871                         IB_USER_VERBS_CMD_ALLOC_PD,
3872                         ib_uverbs_alloc_pd,
3873                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3874                                                 struct ib_uverbs_alloc_pd_resp),
3875                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3876                 DECLARE_UVERBS_WRITE(
3877                         IB_USER_VERBS_CMD_DEALLOC_PD,
3878                         ib_uverbs_dealloc_pd,
3879                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3880                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3881
3882         DECLARE_UVERBS_OBJECT(
3883                 UVERBS_OBJECT_QP,
3884                 DECLARE_UVERBS_WRITE(
3885                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3886                         ib_uverbs_attach_mcast,
3887                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3888                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3889                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3890                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3891                                      ib_uverbs_create_qp,
3892                                      UAPI_DEF_WRITE_UDATA_IO(
3893                                              struct ib_uverbs_create_qp,
3894                                              struct ib_uverbs_create_qp_resp),
3895                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3896                 DECLARE_UVERBS_WRITE(
3897                         IB_USER_VERBS_CMD_DESTROY_QP,
3898                         ib_uverbs_destroy_qp,
3899                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3900                                           struct ib_uverbs_destroy_qp_resp),
3901                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3902                 DECLARE_UVERBS_WRITE(
3903                         IB_USER_VERBS_CMD_DETACH_MCAST,
3904                         ib_uverbs_detach_mcast,
3905                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3906                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3907                 DECLARE_UVERBS_WRITE(
3908                         IB_USER_VERBS_CMD_MODIFY_QP,
3909                         ib_uverbs_modify_qp,
3910                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3911                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3912                 DECLARE_UVERBS_WRITE(
3913                         IB_USER_VERBS_CMD_POST_RECV,
3914                         ib_uverbs_post_recv,
3915                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3916                                           struct ib_uverbs_post_recv_resp),
3917                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3918                 DECLARE_UVERBS_WRITE(
3919                         IB_USER_VERBS_CMD_POST_SEND,
3920                         ib_uverbs_post_send,
3921                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3922                                           struct ib_uverbs_post_send_resp),
3923                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3924                 DECLARE_UVERBS_WRITE(
3925                         IB_USER_VERBS_CMD_QUERY_QP,
3926                         ib_uverbs_query_qp,
3927                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3928                                           struct ib_uverbs_query_qp_resp),
3929                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3930                 DECLARE_UVERBS_WRITE_EX(
3931                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3932                         ib_uverbs_ex_create_qp,
3933                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3934                                              comp_mask,
3935                                              struct ib_uverbs_ex_create_qp_resp,
3936                                              response_length),
3937                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3938                 DECLARE_UVERBS_WRITE_EX(
3939                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3940                         ib_uverbs_ex_modify_qp,
3941                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3942                                              base,
3943                                              struct ib_uverbs_ex_modify_qp_resp,
3944                                              response_length),
3945                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3946
3947         DECLARE_UVERBS_OBJECT(
3948                 UVERBS_OBJECT_RWQ_IND_TBL,
3949                 DECLARE_UVERBS_WRITE_EX(
3950                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3951                         ib_uverbs_ex_create_rwq_ind_table,
3952                         UAPI_DEF_WRITE_IO_EX(
3953                                 struct ib_uverbs_ex_create_rwq_ind_table,
3954                                 log_ind_tbl_size,
3955                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3956                                 ind_tbl_num),
3957                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3958                 DECLARE_UVERBS_WRITE_EX(
3959                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3960                         ib_uverbs_ex_destroy_rwq_ind_table,
3961                         UAPI_DEF_WRITE_I(
3962                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3963                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3964
3965         DECLARE_UVERBS_OBJECT(
3966                 UVERBS_OBJECT_WQ,
3967                 DECLARE_UVERBS_WRITE_EX(
3968                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3969                         ib_uverbs_ex_create_wq,
3970                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3971                                              max_sge,
3972                                              struct ib_uverbs_ex_create_wq_resp,
3973                                              wqn),
3974                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3975                 DECLARE_UVERBS_WRITE_EX(
3976                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3977                         ib_uverbs_ex_destroy_wq,
3978                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3979                                              wq_handle,
3980                                              struct ib_uverbs_ex_destroy_wq_resp,
3981                                              reserved),
3982                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3983                 DECLARE_UVERBS_WRITE_EX(
3984                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3985                         ib_uverbs_ex_modify_wq,
3986                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3987                                             curr_wq_state),
3988                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3989
3990         DECLARE_UVERBS_OBJECT(
3991                 UVERBS_OBJECT_SRQ,
3992                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3993                                      ib_uverbs_create_srq,
3994                                      UAPI_DEF_WRITE_UDATA_IO(
3995                                              struct ib_uverbs_create_srq,
3996                                              struct ib_uverbs_create_srq_resp),
3997                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
3998                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
3999                                      ib_uverbs_create_xsrq,
4000                                      UAPI_DEF_WRITE_UDATA_IO(
4001                                              struct ib_uverbs_create_xsrq,
4002                                              struct ib_uverbs_create_srq_resp),
4003                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4004                 DECLARE_UVERBS_WRITE(
4005                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4006                         ib_uverbs_destroy_srq,
4007                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4008                                           struct ib_uverbs_destroy_srq_resp),
4009                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4010                 DECLARE_UVERBS_WRITE(
4011                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4012                         ib_uverbs_modify_srq,
4013                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4014                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4015                 DECLARE_UVERBS_WRITE(
4016                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4017                         ib_uverbs_post_srq_recv,
4018                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4019                                           struct ib_uverbs_post_srq_recv_resp),
4020                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4021                 DECLARE_UVERBS_WRITE(
4022                         IB_USER_VERBS_CMD_QUERY_SRQ,
4023                         ib_uverbs_query_srq,
4024                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4025                                           struct ib_uverbs_query_srq_resp),
4026                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4027
4028         DECLARE_UVERBS_OBJECT(
4029                 UVERBS_OBJECT_XRCD,
4030                 DECLARE_UVERBS_WRITE(
4031                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4032                         ib_uverbs_close_xrcd,
4033                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd)),
4034                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4035                                      ib_uverbs_open_qp,
4036                                      UAPI_DEF_WRITE_UDATA_IO(
4037                                              struct ib_uverbs_open_qp,
4038                                              struct ib_uverbs_create_qp_resp)),
4039                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4040                                      ib_uverbs_open_xrcd,
4041                                      UAPI_DEF_WRITE_UDATA_IO(
4042                                              struct ib_uverbs_open_xrcd,
4043                                              struct ib_uverbs_open_xrcd_resp)),
4044                 UAPI_DEF_OBJ_NEEDS_FN(alloc_xrcd),
4045                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
4046
4047         {},
4048 };