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             = ib_dev->phys_port_cnt;
 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
 685         if (ib_is_destroy_retryable(ret, why, uobject)) {
 686                 atomic_inc(&xrcd->usecnt);
 687                 return ret;
 688         }
 689
 690         if (inode)
 691                 xrcd_table_delete(dev, inode);
 692
 693         return ret;
 694 }
 695
 696 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 697 {
 698         struct ib_uverbs_reg_mr_resp resp = {};
 699         struct ib_uverbs_reg_mr      cmd;
 700         struct ib_uobject           *uobj;
 701         struct ib_pd                *pd;
 702         struct ib_mr                *mr;
 703         int                          ret;
 704         struct ib_device *ib_dev;
 705
 706         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 707         if (ret)
 708                 return ret;
 709
 710         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 711                 return -EINVAL;
 712
 713         ret = ib_check_mr_access(cmd.access_flags);
 714         if (ret)
 715                 return ret;
 716
 717         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 718         if (IS_ERR(uobj))
 719                 return PTR_ERR(uobj);
 720
 721         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 722         if (!pd) {
 723                 ret = -EINVAL;
 724                 goto err_free;
 725         }
 726
 727         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 728                 if (!(pd->device->attrs.device_cap_flags &
 729                       IB_DEVICE_ON_DEMAND_PAGING)) {
 730                         pr_debug("ODP support not available\n");
 731                         ret = -EINVAL;
 732                         goto err_put;
 733                 }
 734         }
 735
 736         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 737                                          cmd.access_flags,
 738                                          &attrs->driver_udata);
 739         if (IS_ERR(mr)) {
 740                 ret = PTR_ERR(mr);
 741                 goto err_put;
 742         }
 743
 744         mr->device  = pd->device;
 745         mr->pd      = pd;
 746         mr->type    = IB_MR_TYPE_USER;
 747         mr->dm      = NULL;
 748         mr->sig_attrs = NULL;
 749         mr->uobject = uobj;
 750         atomic_inc(&pd->usecnt);
 751         mr->iova = cmd.hca_va;
 752         mr->length = cmd.length;
 753
 754         rdma_restrack_new(&mr->res, RDMA_RESTRACK_MR);
 755         rdma_restrack_set_name(&mr->res, NULL);
 756         rdma_restrack_add(&mr->res);
 757
 758         uobj->object = mr;
 759         uobj_put_obj_read(pd);
 760         uobj_finalize_uobj_create(uobj, attrs);
 761
 762         resp.lkey = mr->lkey;
 763         resp.rkey = mr->rkey;
 764         resp.mr_handle = uobj->id;
 765         return uverbs_response(attrs, &resp, sizeof(resp));
 766
 767 err_put:
 768         uobj_put_obj_read(pd);
 769 err_free:
 770         uobj_alloc_abort(uobj, attrs);
 771         return ret;
 772 }
 773
 774 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 775 {
 776         struct ib_uverbs_rereg_mr      cmd;
 777         struct ib_uverbs_rereg_mr_resp resp;
 778         struct ib_pd                *pd = NULL;
 779         struct ib_mr                *mr;
 780         struct ib_pd                *old_pd;
 781         int                          ret;
 782         struct ib_uobject           *uobj;
 783
 784         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 785         if (ret)
 786                 return ret;
 787
 788         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 789                 return -EINVAL;
 790
 791         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 792             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 793              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 794                         return -EINVAL;
 795
 796         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 797         if (IS_ERR(uobj))
 798                 return PTR_ERR(uobj);
 799
 800         mr = uobj->object;
 801
 802         if (mr->dm) {
 803                 ret = -EINVAL;
 804                 goto put_uobjs;
 805         }
 806
 807         if (cmd.flags & IB_MR_REREG_ACCESS) {
 808                 ret = ib_check_mr_access(cmd.access_flags);
 809                 if (ret)
 810                         goto put_uobjs;
 811         }
 812
 813         if (cmd.flags & IB_MR_REREG_PD) {
 814                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 815                                        attrs);
 816                 if (!pd) {
 817                         ret = -EINVAL;
 818                         goto put_uobjs;
 819                 }
 820         }
 821
 822         old_pd = mr->pd;
 823         ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
 824                                             cmd.length, cmd.hca_va,
 825                                             cmd.access_flags, pd,
 826                                             &attrs->driver_udata);
 827         if (ret)
 828                 goto put_uobj_pd;
 829
 830         if (cmd.flags & IB_MR_REREG_PD) {
 831                 atomic_inc(&pd->usecnt);
 832                 mr->pd = pd;
 833                 atomic_dec(&old_pd->usecnt);
 834         }
 835
 836         if (cmd.flags & IB_MR_REREG_TRANS) {
 837                 mr->iova = cmd.hca_va;
 838                 mr->length = cmd.length;
 839         }
 840
 841         memset(&resp, 0, sizeof(resp));
 842         resp.lkey      = mr->lkey;
 843         resp.rkey      = mr->rkey;
 844
 845         ret = uverbs_response(attrs, &resp, sizeof(resp));
 846
 847 put_uobj_pd:
 848         if (cmd.flags & IB_MR_REREG_PD)
 849                 uobj_put_obj_read(pd);
 850
 851 put_uobjs:
 852         uobj_put_write(uobj);
 853
 854         return ret;
 855 }
 856
 857 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 858 {
 859         struct ib_uverbs_dereg_mr cmd;
 860         int ret;
 861
 862         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 863         if (ret)
 864                 return ret;
 865
 866         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 867 }
 868
 869 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 870 {
 871         struct ib_uverbs_alloc_mw      cmd;
 872         struct ib_uverbs_alloc_mw_resp resp = {};
 873         struct ib_uobject             *uobj;
 874         struct ib_pd                  *pd;
 875         struct ib_mw                  *mw;
 876         int                            ret;
 877         struct ib_device *ib_dev;
 878
 879         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 880         if (ret)
 881                 return ret;
 882
 883         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 884         if (IS_ERR(uobj))
 885                 return PTR_ERR(uobj);
 886
 887         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 888         if (!pd) {
 889                 ret = -EINVAL;
 890                 goto err_free;
 891         }
 892
 893         if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
 894                 ret = -EINVAL;
 895                 goto err_put;
 896         }
 897
 898         mw = rdma_zalloc_drv_obj(ib_dev, ib_mw);
 899         if (!mw) {
 900                 ret = -ENOMEM;
 901                 goto err_put;
 902         }
 903
 904         mw->device = ib_dev;
 905         mw->pd = pd;
 906         mw->uobject = uobj;
 907         mw->type = cmd.mw_type;
 908
 909         ret = pd->device->ops.alloc_mw(mw, &attrs->driver_udata);
 910         if (ret)
 911                 goto err_alloc;
 912
 913         atomic_inc(&pd->usecnt);
 914
 915         uobj->object = mw;
 916         uobj_put_obj_read(pd);
 917         uobj_finalize_uobj_create(uobj, attrs);
 918
 919         resp.rkey = mw->rkey;
 920         resp.mw_handle = uobj->id;
 921         return uverbs_response(attrs, &resp, sizeof(resp));
 922
 923 err_alloc:
 924         kfree(mw);
 925 err_put:
 926         uobj_put_obj_read(pd);
 927 err_free:
 928         uobj_alloc_abort(uobj, attrs);
 929         return ret;
 930 }
 931
 932 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 933 {
 934         struct ib_uverbs_dealloc_mw cmd;
 935         int ret;
 936
 937         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 938         if (ret)
 939                 return ret;
 940
 941         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 942 }
 943
 944 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 945 {
 946         struct ib_uverbs_create_comp_channel       cmd;
 947         struct ib_uverbs_create_comp_channel_resp  resp;
 948         struct ib_uobject                         *uobj;
 949         struct ib_uverbs_completion_event_file    *ev_file;
 950         struct ib_device *ib_dev;
 951         int ret;
 952
 953         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 954         if (ret)
 955                 return ret;
 956
 957         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 958         if (IS_ERR(uobj))
 959                 return PTR_ERR(uobj);
 960
 961         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 962                                uobj);
 963         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 964         uobj_finalize_uobj_create(uobj, attrs);
 965
 966         resp.fd = uobj->id;
 967         return uverbs_response(attrs, &resp, sizeof(resp));
 968 }
 969
 970 static int create_cq(struct uverbs_attr_bundle *attrs,
 971                      struct ib_uverbs_ex_create_cq *cmd)
 972 {
 973         struct ib_ucq_object           *obj;
 974         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 975         struct ib_cq                   *cq;
 976         int                             ret;
 977         struct ib_uverbs_ex_create_cq_resp resp = {};
 978         struct ib_cq_init_attr attr = {};
 979         struct ib_device *ib_dev;
 980
 981         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
 982                 return -EINVAL;
 983
 984         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
 985                                                  &ib_dev);
 986         if (IS_ERR(obj))
 987                 return PTR_ERR(obj);
 988
 989         if (cmd->comp_channel >= 0) {
 990                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
 991                 if (IS_ERR(ev_file)) {
 992                         ret = PTR_ERR(ev_file);
 993                         goto err;
 994                 }
 995         }
 996
 997         obj->uevent.uobject.user_handle = cmd->user_handle;
 998         INIT_LIST_HEAD(&obj->comp_list);
 999         INIT_LIST_HEAD(&obj->uevent.event_list);
1000
1001         attr.cqe = cmd->cqe;
1002         attr.comp_vector = cmd->comp_vector;
1003         attr.flags = cmd->flags;
1004
1005         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1006         if (!cq) {
1007                 ret = -ENOMEM;
1008                 goto err_file;
1009         }
1010         cq->device        = ib_dev;
1011         cq->uobject       = obj;
1012         cq->comp_handler  = ib_uverbs_comp_handler;
1013         cq->event_handler = ib_uverbs_cq_event_handler;
1014         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1015         atomic_set(&cq->usecnt, 0);
1016
1017         rdma_restrack_new(&cq->res, RDMA_RESTRACK_CQ);
1018         rdma_restrack_set_name(&cq->res, NULL);
1019
1020         ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1021         if (ret)
1022                 goto err_free;
1023         rdma_restrack_add(&cq->res);
1024
1025         obj->uevent.uobject.object = cq;
1026         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1027         if (obj->uevent.event_file)
1028                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1029         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1030
1031         resp.base.cq_handle = obj->uevent.uobject.id;
1032         resp.base.cqe = cq->cqe;
1033         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1034         return uverbs_response(attrs, &resp, sizeof(resp));
1035
1036 err_free:
1037         rdma_restrack_put(&cq->res);
1038         kfree(cq);
1039 err_file:
1040         if (ev_file)
1041                 ib_uverbs_release_ucq(ev_file, obj);
1042 err:
1043         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1044         return ret;
1045 }
1046
1047 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1048 {
1049         struct ib_uverbs_create_cq      cmd;
1050         struct ib_uverbs_ex_create_cq   cmd_ex;
1051         int ret;
1052
1053         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1054         if (ret)
1055                 return ret;
1056
1057         memset(&cmd_ex, 0, sizeof(cmd_ex));
1058         cmd_ex.user_handle = cmd.user_handle;
1059         cmd_ex.cqe = cmd.cqe;
1060         cmd_ex.comp_vector = cmd.comp_vector;
1061         cmd_ex.comp_channel = cmd.comp_channel;
1062
1063         return create_cq(attrs, &cmd_ex);
1064 }
1065
1066 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1067 {
1068         struct ib_uverbs_ex_create_cq  cmd;
1069         int ret;
1070
1071         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1072         if (ret)
1073                 return ret;
1074
1075         if (cmd.comp_mask)
1076                 return -EINVAL;
1077
1078         if (cmd.reserved)
1079                 return -EINVAL;
1080
1081         return create_cq(attrs, &cmd);
1082 }
1083
1084 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1085 {
1086         struct ib_uverbs_resize_cq      cmd;
1087         struct ib_uverbs_resize_cq_resp resp = {};
1088         struct ib_cq                    *cq;
1089         int ret;
1090
1091         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1092         if (ret)
1093                 return ret;
1094
1095         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1096         if (!cq)
1097                 return -EINVAL;
1098
1099         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1100         if (ret)
1101                 goto out;
1102
1103         resp.cqe = cq->cqe;
1104
1105         ret = uverbs_response(attrs, &resp, sizeof(resp));
1106 out:
1107         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1108                                 UVERBS_LOOKUP_READ);
1109
1110         return ret;
1111 }
1112
1113 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1114                            struct ib_wc *wc)
1115 {
1116         struct ib_uverbs_wc tmp;
1117
1118         tmp.wr_id               = wc->wr_id;
1119         tmp.status              = wc->status;
1120         tmp.opcode              = wc->opcode;
1121         tmp.vendor_err          = wc->vendor_err;
1122         tmp.byte_len            = wc->byte_len;
1123         tmp.ex.imm_data         = wc->ex.imm_data;
1124         tmp.qp_num              = wc->qp->qp_num;
1125         tmp.src_qp              = wc->src_qp;
1126         tmp.wc_flags            = wc->wc_flags;
1127         tmp.pkey_index          = wc->pkey_index;
1128         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1129                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1130         else
1131                 tmp.slid        = ib_lid_cpu16(wc->slid);
1132         tmp.sl                  = wc->sl;
1133         tmp.dlid_path_bits      = wc->dlid_path_bits;
1134         tmp.port_num            = wc->port_num;
1135         tmp.reserved            = 0;
1136
1137         if (copy_to_user(dest, &tmp, sizeof tmp))
1138                 return -EFAULT;
1139
1140         return 0;
1141 }
1142
1143 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1144 {
1145         struct ib_uverbs_poll_cq       cmd;
1146         struct ib_uverbs_poll_cq_resp  resp;
1147         u8 __user                     *header_ptr;
1148         u8 __user                     *data_ptr;
1149         struct ib_cq                  *cq;
1150         struct ib_wc                   wc;
1151         int                            ret;
1152
1153         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1154         if (ret)
1155                 return ret;
1156
1157         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1158         if (!cq)
1159                 return -EINVAL;
1160
1161         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1162         header_ptr = attrs->ucore.outbuf;
1163         data_ptr = header_ptr + sizeof resp;
1164
1165         memset(&resp, 0, sizeof resp);
1166         while (resp.count < cmd.ne) {
1167                 ret = ib_poll_cq(cq, 1, &wc);
1168                 if (ret < 0)
1169                         goto out_put;
1170                 if (!ret)
1171                         break;
1172
1173                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1174                 if (ret)
1175                         goto out_put;
1176
1177                 data_ptr += sizeof(struct ib_uverbs_wc);
1178                 ++resp.count;
1179         }
1180
1181         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1182                 ret = -EFAULT;
1183                 goto out_put;
1184         }
1185         ret = 0;
1186
1187         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1188                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1189
1190 out_put:
1191         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1192                                 UVERBS_LOOKUP_READ);
1193         return ret;
1194 }
1195
1196 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1197 {
1198         struct ib_uverbs_req_notify_cq cmd;
1199         struct ib_cq                  *cq;
1200         int ret;
1201
1202         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1203         if (ret)
1204                 return ret;
1205
1206         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1207         if (!cq)
1208                 return -EINVAL;
1209
1210         ib_req_notify_cq(cq, cmd.solicited_only ?
1211                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1212
1213         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1214                                 UVERBS_LOOKUP_READ);
1215         return 0;
1216 }
1217
1218 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1219 {
1220         struct ib_uverbs_destroy_cq      cmd;
1221         struct ib_uverbs_destroy_cq_resp resp;
1222         struct ib_uobject               *uobj;
1223         struct ib_ucq_object            *obj;
1224         int ret;
1225
1226         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1227         if (ret)
1228                 return ret;
1229
1230         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1231         if (IS_ERR(uobj))
1232                 return PTR_ERR(uobj);
1233
1234         obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1235         memset(&resp, 0, sizeof(resp));
1236         resp.comp_events_reported  = obj->comp_events_reported;
1237         resp.async_events_reported = obj->uevent.events_reported;
1238
1239         uobj_put_destroy(uobj);
1240
1241         return uverbs_response(attrs, &resp, sizeof(resp));
1242 }
1243
1244 static int create_qp(struct uverbs_attr_bundle *attrs,
1245                      struct ib_uverbs_ex_create_qp *cmd)
1246 {
1247         struct ib_uqp_object            *obj;
1248         struct ib_device                *device;
1249         struct ib_pd                    *pd = NULL;
1250         struct ib_xrcd                  *xrcd = NULL;
1251         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1252         struct ib_cq                    *scq = NULL, *rcq = NULL;
1253         struct ib_srq                   *srq = NULL;
1254         struct ib_qp                    *qp;
1255         struct ib_qp_init_attr          attr = {};
1256         struct ib_uverbs_ex_create_qp_resp resp = {};
1257         int                             ret;
1258         struct ib_rwq_ind_table *ind_tbl = NULL;
1259         bool has_sq = true;
1260         struct ib_device *ib_dev;
1261
1262         switch (cmd->qp_type) {
1263         case IB_QPT_RAW_PACKET:
1264                 if (!capable(CAP_NET_RAW))
1265                         return -EPERM;
1266                 break;
1267         case IB_QPT_RC:
1268         case IB_QPT_UC:
1269         case IB_QPT_UD:
1270         case IB_QPT_XRC_INI:
1271         case IB_QPT_XRC_TGT:
1272         case IB_QPT_DRIVER:
1273                 break;
1274         default:
1275                 return -EINVAL;
1276         }
1277
1278         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1279                                                  &ib_dev);
1280         if (IS_ERR(obj))
1281                 return PTR_ERR(obj);
1282         obj->uxrcd = NULL;
1283         obj->uevent.uobject.user_handle = cmd->user_handle;
1284         mutex_init(&obj->mcast_lock);
1285
1286         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1287                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1288                                             UVERBS_OBJECT_RWQ_IND_TBL,
1289                                             cmd->rwq_ind_tbl_handle, attrs);
1290                 if (!ind_tbl) {
1291                         ret = -EINVAL;
1292                         goto err_put;
1293                 }
1294
1295                 attr.rwq_ind_tbl = ind_tbl;
1296         }
1297
1298         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1299                 ret = -EINVAL;
1300                 goto err_put;
1301         }
1302
1303         if (ind_tbl && !cmd->max_send_wr)
1304                 has_sq = false;
1305
1306         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1307                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1308                                           attrs);
1309
1310                 if (IS_ERR(xrcd_uobj)) {
1311                         ret = -EINVAL;
1312                         goto err_put;
1313                 }
1314
1315                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1316                 if (!xrcd) {
1317                         ret = -EINVAL;
1318                         goto err_put;
1319                 }
1320                 device = xrcd->device;
1321         } else {
1322                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1323                         cmd->max_recv_wr = 0;
1324                         cmd->max_recv_sge = 0;
1325                 } else {
1326                         if (cmd->is_srq) {
1327                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1328                                                         cmd->srq_handle, attrs);
1329                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1330                                         ret = -EINVAL;
1331                                         goto err_put;
1332                                 }
1333                         }
1334
1335                         if (!ind_tbl) {
1336                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1337                                         rcq = uobj_get_obj_read(
1338                                                 cq, UVERBS_OBJECT_CQ,
1339                                                 cmd->recv_cq_handle, attrs);
1340                                         if (!rcq) {
1341                                                 ret = -EINVAL;
1342                                                 goto err_put;
1343                                         }
1344                                 }
1345                         }
1346                 }
1347
1348                 if (has_sq)
1349                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1350                                                 cmd->send_cq_handle, attrs);
1351                 if (!ind_tbl)
1352                         rcq = rcq ?: scq;
1353                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1354                                        attrs);
1355                 if (!pd || (!scq && has_sq)) {
1356                         ret = -EINVAL;
1357                         goto err_put;
1358                 }
1359
1360                 device = pd->device;
1361         }
1362
1363         attr.event_handler = ib_uverbs_qp_event_handler;
1364         attr.send_cq       = scq;
1365         attr.recv_cq       = rcq;
1366         attr.srq           = srq;
1367         attr.xrcd          = xrcd;
1368         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1369                                               IB_SIGNAL_REQ_WR;
1370         attr.qp_type       = cmd->qp_type;
1371         attr.create_flags  = 0;
1372
1373         attr.cap.max_send_wr     = cmd->max_send_wr;
1374         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1375         attr.cap.max_send_sge    = cmd->max_send_sge;
1376         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1377         attr.cap.max_inline_data = cmd->max_inline_data;
1378
1379         INIT_LIST_HEAD(&obj->uevent.event_list);
1380         INIT_LIST_HEAD(&obj->mcast_list);
1381
1382         attr.create_flags = cmd->create_flags;
1383         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1384                                 IB_QP_CREATE_CROSS_CHANNEL |
1385                                 IB_QP_CREATE_MANAGED_SEND |
1386                                 IB_QP_CREATE_MANAGED_RECV |
1387                                 IB_QP_CREATE_SCATTER_FCS |
1388                                 IB_QP_CREATE_CVLAN_STRIPPING |
1389                                 IB_QP_CREATE_SOURCE_QPN |
1390                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1391                 ret = -EINVAL;
1392                 goto err_put;
1393         }
1394
1395         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1396                 if (!capable(CAP_NET_RAW)) {
1397                         ret = -EPERM;
1398                         goto err_put;
1399                 }
1400
1401                 attr.source_qpn = cmd->source_qpn;
1402         }
1403
1404         if (cmd->qp_type == IB_QPT_XRC_TGT)
1405                 qp = ib_create_qp(pd, &attr);
1406         else
1407                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1408                                    obj);
1409
1410         if (IS_ERR(qp)) {
1411                 ret = PTR_ERR(qp);
1412                 goto err_put;
1413         }
1414
1415         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1416                 ret = ib_create_qp_security(qp, device);
1417                 if (ret)
1418                         goto err_cb;
1419
1420                 atomic_inc(&pd->usecnt);
1421                 if (attr.send_cq)
1422                         atomic_inc(&attr.send_cq->usecnt);
1423                 if (attr.recv_cq)
1424                         atomic_inc(&attr.recv_cq->usecnt);
1425                 if (attr.srq)
1426                         atomic_inc(&attr.srq->usecnt);
1427                 if (ind_tbl)
1428                         atomic_inc(&ind_tbl->usecnt);
1429         } else {
1430                 /* It is done in _ib_create_qp for other QP types */
1431                 qp->uobject = obj;
1432         }
1433
1434         obj->uevent.uobject.object = qp;
1435         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
1436         if (obj->uevent.event_file)
1437                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
1438
1439         if (xrcd) {
1440                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1441                                           uobject);
1442                 atomic_inc(&obj->uxrcd->refcnt);
1443                 uobj_put_read(xrcd_uobj);
1444         }
1445
1446         if (pd)
1447                 uobj_put_obj_read(pd);
1448         if (scq)
1449                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1450                                         UVERBS_LOOKUP_READ);
1451         if (rcq && rcq != scq)
1452                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1453                                         UVERBS_LOOKUP_READ);
1454         if (srq)
1455                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1456                                         UVERBS_LOOKUP_READ);
1457         if (ind_tbl)
1458                 uobj_put_obj_read(ind_tbl);
1459         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1460
1461         resp.base.qpn             = qp->qp_num;
1462         resp.base.qp_handle       = obj->uevent.uobject.id;
1463         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1464         resp.base.max_send_sge    = attr.cap.max_send_sge;
1465         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1466         resp.base.max_send_wr     = attr.cap.max_send_wr;
1467         resp.base.max_inline_data = attr.cap.max_inline_data;
1468         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1469         return uverbs_response(attrs, &resp, sizeof(resp));
1470
1471 err_cb:
1472         ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1473
1474 err_put:
1475         if (!IS_ERR(xrcd_uobj))
1476                 uobj_put_read(xrcd_uobj);
1477         if (pd)
1478                 uobj_put_obj_read(pd);
1479         if (scq)
1480                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1481                                         UVERBS_LOOKUP_READ);
1482         if (rcq && rcq != scq)
1483                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1484                                         UVERBS_LOOKUP_READ);
1485         if (srq)
1486                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1487                                         UVERBS_LOOKUP_READ);
1488         if (ind_tbl)
1489                 uobj_put_obj_read(ind_tbl);
1490
1491         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1492         return ret;
1493 }
1494
1495 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1496 {
1497         struct ib_uverbs_create_qp      cmd;
1498         struct ib_uverbs_ex_create_qp   cmd_ex;
1499         int ret;
1500
1501         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1502         if (ret)
1503                 return ret;
1504
1505         memset(&cmd_ex, 0, sizeof(cmd_ex));
1506         cmd_ex.user_handle = cmd.user_handle;
1507         cmd_ex.pd_handle = cmd.pd_handle;
1508         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1509         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1510         cmd_ex.srq_handle = cmd.srq_handle;
1511         cmd_ex.max_send_wr = cmd.max_send_wr;
1512         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1513         cmd_ex.max_send_sge = cmd.max_send_sge;
1514         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1515         cmd_ex.max_inline_data = cmd.max_inline_data;
1516         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1517         cmd_ex.qp_type = cmd.qp_type;
1518         cmd_ex.is_srq = cmd.is_srq;
1519
1520         return create_qp(attrs, &cmd_ex);
1521 }
1522
1523 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1524 {
1525         struct ib_uverbs_ex_create_qp cmd;
1526         int ret;
1527
1528         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1529         if (ret)
1530                 return ret;
1531
1532         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1533                 return -EINVAL;
1534
1535         if (cmd.reserved)
1536                 return -EINVAL;
1537
1538         return create_qp(attrs, &cmd);
1539 }
1540
1541 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1542 {
1543         struct ib_uverbs_create_qp_resp resp = {};
1544         struct ib_uverbs_open_qp        cmd;
1545         struct ib_uqp_object           *obj;
1546         struct ib_xrcd                 *xrcd;
1547         struct ib_qp                   *qp;
1548         struct ib_qp_open_attr          attr = {};
1549         int ret;
1550         struct ib_uobject *xrcd_uobj;
1551         struct ib_device *ib_dev;
1552
1553         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1554         if (ret)
1555                 return ret;
1556
1557         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1558                                                  &ib_dev);
1559         if (IS_ERR(obj))
1560                 return PTR_ERR(obj);
1561
1562         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1563         if (IS_ERR(xrcd_uobj)) {
1564                 ret = -EINVAL;
1565                 goto err_put;
1566         }
1567
1568         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1569         if (!xrcd) {
1570                 ret = -EINVAL;
1571                 goto err_xrcd;
1572         }
1573
1574         attr.event_handler = ib_uverbs_qp_event_handler;
1575         attr.qp_num        = cmd.qpn;
1576         attr.qp_type       = cmd.qp_type;
1577
1578         INIT_LIST_HEAD(&obj->uevent.event_list);
1579         INIT_LIST_HEAD(&obj->mcast_list);
1580
1581         qp = ib_open_qp(xrcd, &attr);
1582         if (IS_ERR(qp)) {
1583                 ret = PTR_ERR(qp);
1584                 goto err_xrcd;
1585         }
1586
1587         obj->uevent.uobject.object = qp;
1588         obj->uevent.uobject.user_handle = cmd.user_handle;
1589
1590         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1591         atomic_inc(&obj->uxrcd->refcnt);
1592         qp->uobject = obj;
1593         uobj_put_read(xrcd_uobj);
1594         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
1595
1596         resp.qpn = qp->qp_num;
1597         resp.qp_handle = obj->uevent.uobject.id;
1598         return uverbs_response(attrs, &resp, sizeof(resp));
1599
1600 err_xrcd:
1601         uobj_put_read(xrcd_uobj);
1602 err_put:
1603         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1604         return ret;
1605 }
1606
1607 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1608                                    struct rdma_ah_attr *rdma_attr)
1609 {
1610         const struct ib_global_route   *grh;
1611
1612         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1613         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1614         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1615         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1616         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1617                                          IB_AH_GRH);
1618         if (uverb_attr->is_global) {
1619                 grh = rdma_ah_read_grh(rdma_attr);
1620                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1621                 uverb_attr->flow_label        = grh->flow_label;
1622                 uverb_attr->sgid_index        = grh->sgid_index;
1623                 uverb_attr->hop_limit         = grh->hop_limit;
1624                 uverb_attr->traffic_class     = grh->traffic_class;
1625         }
1626         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1627 }
1628
1629 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1630 {
1631         struct ib_uverbs_query_qp      cmd;
1632         struct ib_uverbs_query_qp_resp resp;
1633         struct ib_qp                   *qp;
1634         struct ib_qp_attr              *attr;
1635         struct ib_qp_init_attr         *init_attr;
1636         int                            ret;
1637
1638         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1639         if (ret)
1640                 return ret;
1641
1642         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1643         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1644         if (!attr || !init_attr) {
1645                 ret = -ENOMEM;
1646                 goto out;
1647         }
1648
1649         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1650         if (!qp) {
1651                 ret = -EINVAL;
1652                 goto out;
1653         }
1654
1655         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1656
1657         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1658                                 UVERBS_LOOKUP_READ);
1659
1660         if (ret)
1661                 goto out;
1662
1663         memset(&resp, 0, sizeof resp);
1664
1665         resp.qp_state               = attr->qp_state;
1666         resp.cur_qp_state           = attr->cur_qp_state;
1667         resp.path_mtu               = attr->path_mtu;
1668         resp.path_mig_state         = attr->path_mig_state;
1669         resp.qkey                   = attr->qkey;
1670         resp.rq_psn                 = attr->rq_psn;
1671         resp.sq_psn                 = attr->sq_psn;
1672         resp.dest_qp_num            = attr->dest_qp_num;
1673         resp.qp_access_flags        = attr->qp_access_flags;
1674         resp.pkey_index             = attr->pkey_index;
1675         resp.alt_pkey_index         = attr->alt_pkey_index;
1676         resp.sq_draining            = attr->sq_draining;
1677         resp.max_rd_atomic          = attr->max_rd_atomic;
1678         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1679         resp.min_rnr_timer          = attr->min_rnr_timer;
1680         resp.port_num               = attr->port_num;
1681         resp.timeout                = attr->timeout;
1682         resp.retry_cnt              = attr->retry_cnt;
1683         resp.rnr_retry              = attr->rnr_retry;
1684         resp.alt_port_num           = attr->alt_port_num;
1685         resp.alt_timeout            = attr->alt_timeout;
1686
1687         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1688         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1689
1690         resp.max_send_wr            = init_attr->cap.max_send_wr;
1691         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1692         resp.max_send_sge           = init_attr->cap.max_send_sge;
1693         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1694         resp.max_inline_data        = init_attr->cap.max_inline_data;
1695         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1696
1697         ret = uverbs_response(attrs, &resp, sizeof(resp));
1698
1699 out:
1700         kfree(attr);
1701         kfree(init_attr);
1702
1703         return ret;
1704 }
1705
1706 /* Remove ignored fields set in the attribute mask */
1707 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1708 {
1709         switch (qp_type) {
1710         case IB_QPT_XRC_INI:
1711                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1712         case IB_QPT_XRC_TGT:
1713                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1714                                 IB_QP_RNR_RETRY);
1715         default:
1716                 return mask;
1717         }
1718 }
1719
1720 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1721                                      struct rdma_ah_attr *rdma_attr,
1722                                      struct ib_uverbs_qp_dest *uverb_attr)
1723 {
1724         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1725         if (uverb_attr->is_global) {
1726                 rdma_ah_set_grh(rdma_attr, NULL,
1727                                 uverb_attr->flow_label,
1728                                 uverb_attr->sgid_index,
1729                                 uverb_attr->hop_limit,
1730                                 uverb_attr->traffic_class);
1731                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1732         } else {
1733                 rdma_ah_set_ah_flags(rdma_attr, 0);
1734         }
1735         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1736         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1737         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1738         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1739         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1740         rdma_ah_set_make_grd(rdma_attr, false);
1741 }
1742
1743 static int modify_qp(struct uverbs_attr_bundle *attrs,
1744                      struct ib_uverbs_ex_modify_qp *cmd)
1745 {
1746         struct ib_qp_attr *attr;
1747         struct ib_qp *qp;
1748         int ret;
1749
1750         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1751         if (!attr)
1752                 return -ENOMEM;
1753
1754         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1755                                attrs);
1756         if (!qp) {
1757                 ret = -EINVAL;
1758                 goto out;
1759         }
1760
1761         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1762             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1763                 ret = -EINVAL;
1764                 goto release_qp;
1765         }
1766
1767         if ((cmd->base.attr_mask & IB_QP_AV)) {
1768                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1769                         ret = -EINVAL;
1770                         goto release_qp;
1771                 }
1772
1773                 if (cmd->base.attr_mask & IB_QP_STATE &&
1774                     cmd->base.qp_state == IB_QPS_RTR) {
1775                 /* We are in INIT->RTR TRANSITION (if we are not,
1776                  * this transition will be rejected in subsequent checks).
1777                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1778                  * but the IB_QP_STATE flag is required.
1779                  *
1780                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1781                  * when IB_QP_AV is set, has required inclusion of a valid
1782                  * port number in the primary AV. (AVs are created and handled
1783                  * differently for infiniband and ethernet (RoCE) ports).
1784                  *
1785                  * Check the port number included in the primary AV against
1786                  * the port number in the qp struct, which was set (and saved)
1787                  * in the RST->INIT transition.
1788                  */
1789                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1790                                 ret = -EINVAL;
1791                                 goto release_qp;
1792                         }
1793                 } else {
1794                 /* We are in SQD->SQD. (If we are not, this transition will
1795                  * be rejected later in the verbs layer checks).
1796                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1797                  * together in the SQD->SQD transition.
1798                  *
1799                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1800                  * verbs layer driver does not track primary port changes
1801                  * resulting from path migration. Thus, in SQD, if the primary
1802                  * AV is modified, the primary port should also be modified).
1803                  *
1804                  * Note that in this transition, the IB_QP_STATE flag
1805                  * is not allowed.
1806                  */
1807                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1808                              == (IB_QP_AV | IB_QP_PORT)) &&
1809                             cmd->base.port_num != cmd->base.dest.port_num) {
1810                                 ret = -EINVAL;
1811                                 goto release_qp;
1812                         }
1813                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1814                             == IB_QP_AV) {
1815                                 cmd->base.attr_mask |= IB_QP_PORT;
1816                                 cmd->base.port_num = cmd->base.dest.port_num;
1817                         }
1818                 }
1819         }
1820
1821         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1822             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1823             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1824             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1825                 ret = -EINVAL;
1826                 goto release_qp;
1827         }
1828
1829         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1830             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1831             (cmd->base.attr_mask & IB_QP_STATE &&
1832             cmd->base.qp_state > IB_QPS_ERR)) {
1833                 ret = -EINVAL;
1834                 goto release_qp;
1835         }
1836
1837         if (cmd->base.attr_mask & IB_QP_STATE)
1838                 attr->qp_state = cmd->base.qp_state;
1839         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1840                 attr->cur_qp_state = cmd->base.cur_qp_state;
1841         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1842                 attr->path_mtu = cmd->base.path_mtu;
1843         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1844                 attr->path_mig_state = cmd->base.path_mig_state;
1845         if (cmd->base.attr_mask & IB_QP_QKEY) {
1846                 if (cmd->base.qkey & IB_QP_SET_QKEY && !capable(CAP_NET_RAW)) {
1847                         ret = -EPERM;
1848                         goto release_qp;
1849                 }
1850                 attr->qkey = cmd->base.qkey;
1851         }
1852         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1853                 attr->rq_psn = cmd->base.rq_psn;
1854         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1855                 attr->sq_psn = cmd->base.sq_psn;
1856         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1857                 attr->dest_qp_num = cmd->base.dest_qp_num;
1858         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1859                 attr->qp_access_flags = cmd->base.qp_access_flags;
1860         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1861                 attr->pkey_index = cmd->base.pkey_index;
1862         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1863                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1864         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1865                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1866         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1867                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1868         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1869                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1870         if (cmd->base.attr_mask & IB_QP_PORT)
1871                 attr->port_num = cmd->base.port_num;
1872         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1873                 attr->timeout = cmd->base.timeout;
1874         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1875                 attr->retry_cnt = cmd->base.retry_cnt;
1876         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1877                 attr->rnr_retry = cmd->base.rnr_retry;
1878         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1879                 attr->alt_port_num = cmd->base.alt_port_num;
1880                 attr->alt_timeout = cmd->base.alt_timeout;
1881                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1882         }
1883         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1884                 attr->rate_limit = cmd->rate_limit;
1885
1886         if (cmd->base.attr_mask & IB_QP_AV)
1887                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1888                                          &cmd->base.dest);
1889
1890         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1891                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1892                                          &cmd->base.alt_dest);
1893
1894         ret = ib_modify_qp_with_udata(qp, attr,
1895                                       modify_qp_mask(qp->qp_type,
1896                                                      cmd->base.attr_mask),
1897                                       &attrs->driver_udata);
1898
1899 release_qp:
1900         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1901                                 UVERBS_LOOKUP_READ);
1902 out:
1903         kfree(attr);
1904
1905         return ret;
1906 }
1907
1908 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1909 {
1910         struct ib_uverbs_ex_modify_qp cmd;
1911         int ret;
1912
1913         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1914         if (ret)
1915                 return ret;
1916
1917         if (cmd.base.attr_mask &
1918             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1919                 return -EOPNOTSUPP;
1920
1921         return modify_qp(attrs, &cmd);
1922 }
1923
1924 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1925 {
1926         struct ib_uverbs_ex_modify_qp cmd;
1927         struct ib_uverbs_ex_modify_qp_resp resp = {
1928                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1929         };
1930         int ret;
1931
1932         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1933         if (ret)
1934                 return ret;
1935
1936         /*
1937          * Last bit is reserved for extending the attr_mask by
1938          * using another field.
1939          */
1940         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1ULL << 31));
1941
1942         if (cmd.base.attr_mask &
1943             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
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), GFP_KERNEL);
1986 }
1987
1988 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
1989 {
1990         struct ib_uverbs_post_send      cmd;
1991         struct ib_uverbs_post_send_resp resp;
1992         struct ib_uverbs_send_wr       *user_wr;
1993         struct ib_send_wr              *wr = NULL, *last, *next;
1994         const struct ib_send_wr        *bad_wr;
1995         struct ib_qp                   *qp;
1996         int                             i, sg_ind;
1997         int                             is_ud;
1998         int ret, ret2;
1999         size_t                          next_size;
2000         const struct ib_sge __user *sgls;
2001         const void __user *wqes;
2002         struct uverbs_req_iter iter;
2003
2004         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2005         if (ret)
2006                 return ret;
2007         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2008         if (IS_ERR(wqes))
2009                 return PTR_ERR(wqes);
2010         sgls = uverbs_request_next_ptr(
2011                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2012         if (IS_ERR(sgls))
2013                 return PTR_ERR(sgls);
2014         ret = uverbs_request_finish(&iter);
2015         if (ret)
2016                 return ret;
2017
2018         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2019         if (!user_wr)
2020                 return -ENOMEM;
2021
2022         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2023         if (!qp) {
2024                 ret = -EINVAL;
2025                 goto out;
2026         }
2027
2028         is_ud = qp->qp_type == IB_QPT_UD;
2029         sg_ind = 0;
2030         last = NULL;
2031         for (i = 0; i < cmd.wr_count; ++i) {
2032                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2033                                    cmd.wqe_size)) {
2034                         ret = -EFAULT;
2035                         goto out_put;
2036                 }
2037
2038                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2039                         ret = -EINVAL;
2040                         goto out_put;
2041                 }
2042
2043                 if (is_ud) {
2044                         struct ib_ud_wr *ud;
2045
2046                         if (user_wr->opcode != IB_WR_SEND &&
2047                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2048                                 ret = -EINVAL;
2049                                 goto out_put;
2050                         }
2051
2052                         next_size = sizeof(*ud);
2053                         ud = alloc_wr(next_size, user_wr->num_sge);
2054                         if (!ud) {
2055                                 ret = -ENOMEM;
2056                                 goto out_put;
2057                         }
2058
2059                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2060                                                    user_wr->wr.ud.ah, attrs);
2061                         if (!ud->ah) {
2062                                 kfree(ud);
2063                                 ret = -EINVAL;
2064                                 goto out_put;
2065                         }
2066                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2067                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2068
2069                         next = &ud->wr;
2070                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2071                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2072                            user_wr->opcode == IB_WR_RDMA_READ) {
2073                         struct ib_rdma_wr *rdma;
2074
2075                         next_size = sizeof(*rdma);
2076                         rdma = alloc_wr(next_size, user_wr->num_sge);
2077                         if (!rdma) {
2078                                 ret = -ENOMEM;
2079                                 goto out_put;
2080                         }
2081
2082                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2083                         rdma->rkey = user_wr->wr.rdma.rkey;
2084
2085                         next = &rdma->wr;
2086                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2087                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2088                         struct ib_atomic_wr *atomic;
2089
2090                         next_size = sizeof(*atomic);
2091                         atomic = alloc_wr(next_size, user_wr->num_sge);
2092                         if (!atomic) {
2093                                 ret = -ENOMEM;
2094                                 goto out_put;
2095                         }
2096
2097                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2098                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2099                         atomic->swap = user_wr->wr.atomic.swap;
2100                         atomic->rkey = user_wr->wr.atomic.rkey;
2101
2102                         next = &atomic->wr;
2103                 } else if (user_wr->opcode == IB_WR_SEND ||
2104                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2105                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2106                         next_size = sizeof(*next);
2107                         next = alloc_wr(next_size, user_wr->num_sge);
2108                         if (!next) {
2109                                 ret = -ENOMEM;
2110                                 goto out_put;
2111                         }
2112                 } else {
2113                         ret = -EINVAL;
2114                         goto out_put;
2115                 }
2116
2117                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2118                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2119                         next->ex.imm_data =
2120                                         (__be32 __force) user_wr->ex.imm_data;
2121                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2122                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2123                 }
2124
2125                 if (!last)
2126                         wr = next;
2127                 else
2128                         last->next = next;
2129                 last = next;
2130
2131                 next->next       = NULL;
2132                 next->wr_id      = user_wr->wr_id;
2133                 next->num_sge    = user_wr->num_sge;
2134                 next->opcode     = user_wr->opcode;
2135                 next->send_flags = user_wr->send_flags;
2136
2137                 if (next->num_sge) {
2138                         next->sg_list = (void *) next +
2139                                 ALIGN(next_size, sizeof(struct ib_sge));
2140                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2141                                            next->num_sge *
2142                                                    sizeof(struct ib_sge))) {
2143                                 ret = -EFAULT;
2144                                 goto out_put;
2145                         }
2146                         sg_ind += next->num_sge;
2147                 } else
2148                         next->sg_list = NULL;
2149         }
2150
2151         resp.bad_wr = 0;
2152         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2153         if (ret)
2154                 for (next = wr; next; next = next->next) {
2155                         ++resp.bad_wr;
2156                         if (next == bad_wr)
2157                                 break;
2158                 }
2159
2160         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2161         if (ret2)
2162                 ret = ret2;
2163
2164 out_put:
2165         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2166                                 UVERBS_LOOKUP_READ);
2167
2168         while (wr) {
2169                 if (is_ud && ud_wr(wr)->ah)
2170                         uobj_put_obj_read(ud_wr(wr)->ah);
2171                 next = wr->next;
2172                 kfree(wr);
2173                 wr = next;
2174         }
2175
2176 out:
2177         kfree(user_wr);
2178
2179         return ret;
2180 }
2181
2182 static struct ib_recv_wr *
2183 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2184                           u32 wqe_size, u32 sge_count)
2185 {
2186         struct ib_uverbs_recv_wr *user_wr;
2187         struct ib_recv_wr        *wr = NULL, *last, *next;
2188         int                       sg_ind;
2189         int                       i;
2190         int                       ret;
2191         const struct ib_sge __user *sgls;
2192         const void __user *wqes;
2193
2194         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2195                 return ERR_PTR(-EINVAL);
2196
2197         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2198         if (IS_ERR(wqes))
2199                 return ERR_CAST(wqes);
2200         sgls = uverbs_request_next_ptr(
2201                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2202         if (IS_ERR(sgls))
2203                 return ERR_CAST(sgls);
2204         ret = uverbs_request_finish(iter);
2205         if (ret)
2206                 return ERR_PTR(ret);
2207
2208         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2209         if (!user_wr)
2210                 return ERR_PTR(-ENOMEM);
2211
2212         sg_ind = 0;
2213         last = NULL;
2214         for (i = 0; i < wr_count; ++i) {
2215                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2216                                    wqe_size)) {
2217                         ret = -EFAULT;
2218                         goto err;
2219                 }
2220
2221                 if (user_wr->num_sge + sg_ind > sge_count) {
2222                         ret = -EINVAL;
2223                         goto err;
2224                 }
2225
2226                 if (user_wr->num_sge >=
2227                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2228                     sizeof (struct ib_sge)) {
2229                         ret = -EINVAL;
2230                         goto err;
2231                 }
2232
2233                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2234                                user_wr->num_sge * sizeof (struct ib_sge),
2235                                GFP_KERNEL);
2236                 if (!next) {
2237                         ret = -ENOMEM;
2238                         goto err;
2239                 }
2240
2241                 if (!last)
2242                         wr = next;
2243                 else
2244                         last->next = next;
2245                 last = next;
2246
2247                 next->next       = NULL;
2248                 next->wr_id      = user_wr->wr_id;
2249                 next->num_sge    = user_wr->num_sge;
2250
2251                 if (next->num_sge) {
2252                         next->sg_list = (void *) next +
2253                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2254                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2255                                            next->num_sge *
2256                                                    sizeof(struct ib_sge))) {
2257                                 ret = -EFAULT;
2258                                 goto err;
2259                         }
2260                         sg_ind += next->num_sge;
2261                 } else
2262                         next->sg_list = NULL;
2263         }
2264
2265         kfree(user_wr);
2266         return wr;
2267
2268 err:
2269         kfree(user_wr);
2270
2271         while (wr) {
2272                 next = wr->next;
2273                 kfree(wr);
2274                 wr = next;
2275         }
2276
2277         return ERR_PTR(ret);
2278 }
2279
2280 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2281 {
2282         struct ib_uverbs_post_recv      cmd;
2283         struct ib_uverbs_post_recv_resp resp;
2284         struct ib_recv_wr              *wr, *next;
2285         const struct ib_recv_wr        *bad_wr;
2286         struct ib_qp                   *qp;
2287         int ret, ret2;
2288         struct uverbs_req_iter iter;
2289
2290         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2291         if (ret)
2292                 return ret;
2293
2294         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2295                                        cmd.sge_count);
2296         if (IS_ERR(wr))
2297                 return PTR_ERR(wr);
2298
2299         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2300         if (!qp) {
2301                 ret = -EINVAL;
2302                 goto out;
2303         }
2304
2305         resp.bad_wr = 0;
2306         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2307
2308         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2309                                 UVERBS_LOOKUP_READ);
2310         if (ret) {
2311                 for (next = wr; next; next = next->next) {
2312                         ++resp.bad_wr;
2313                         if (next == bad_wr)
2314                                 break;
2315                 }
2316         }
2317
2318         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2319         if (ret2)
2320                 ret = ret2;
2321 out:
2322         while (wr) {
2323                 next = wr->next;
2324                 kfree(wr);
2325                 wr = next;
2326         }
2327
2328         return ret;
2329 }
2330
2331 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2332 {
2333         struct ib_uverbs_post_srq_recv      cmd;
2334         struct ib_uverbs_post_srq_recv_resp resp;
2335         struct ib_recv_wr                  *wr, *next;
2336         const struct ib_recv_wr            *bad_wr;
2337         struct ib_srq                      *srq;
2338         int ret, ret2;
2339         struct uverbs_req_iter iter;
2340
2341         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2342         if (ret)
2343                 return ret;
2344
2345         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2346                                        cmd.sge_count);
2347         if (IS_ERR(wr))
2348                 return PTR_ERR(wr);
2349
2350         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2351         if (!srq) {
2352                 ret = -EINVAL;
2353                 goto out;
2354         }
2355
2356         resp.bad_wr = 0;
2357         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2358
2359         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2360                                 UVERBS_LOOKUP_READ);
2361
2362         if (ret)
2363                 for (next = wr; next; next = next->next) {
2364                         ++resp.bad_wr;
2365                         if (next == bad_wr)
2366                                 break;
2367                 }
2368
2369         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2370         if (ret2)
2371                 ret = ret2;
2372
2373 out:
2374         while (wr) {
2375                 next = wr->next;
2376                 kfree(wr);
2377                 wr = next;
2378         }
2379
2380         return ret;
2381 }
2382
2383 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2384 {
2385         struct ib_uverbs_create_ah       cmd;
2386         struct ib_uverbs_create_ah_resp  resp;
2387         struct ib_uobject               *uobj;
2388         struct ib_pd                    *pd;
2389         struct ib_ah                    *ah;
2390         struct rdma_ah_attr             attr = {};
2391         int ret;
2392         struct ib_device *ib_dev;
2393
2394         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2395         if (ret)
2396                 return ret;
2397
2398         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2399         if (IS_ERR(uobj))
2400                 return PTR_ERR(uobj);
2401
2402         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2403                 ret = -EINVAL;
2404                 goto err;
2405         }
2406
2407         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2408         if (!pd) {
2409                 ret = -EINVAL;
2410                 goto err;
2411         }
2412
2413         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2414         rdma_ah_set_make_grd(&attr, false);
2415         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2416         rdma_ah_set_sl(&attr, cmd.attr.sl);
2417         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2418         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2419         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2420
2421         if (cmd.attr.is_global) {
2422                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2423                                 cmd.attr.grh.sgid_index,
2424                                 cmd.attr.grh.hop_limit,
2425                                 cmd.attr.grh.traffic_class);
2426                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2427         } else {
2428                 rdma_ah_set_ah_flags(&attr, 0);
2429         }
2430
2431         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2432         if (IS_ERR(ah)) {
2433                 ret = PTR_ERR(ah);
2434                 goto err_put;
2435         }
2436
2437         ah->uobject  = uobj;
2438         uobj->user_handle = cmd.user_handle;
2439         uobj->object = ah;
2440         uobj_put_obj_read(pd);
2441         uobj_finalize_uobj_create(uobj, attrs);
2442
2443         resp.ah_handle = uobj->id;
2444         return uverbs_response(attrs, &resp, sizeof(resp));
2445
2446 err_put:
2447         uobj_put_obj_read(pd);
2448 err:
2449         uobj_alloc_abort(uobj, attrs);
2450         return ret;
2451 }
2452
2453 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2454 {
2455         struct ib_uverbs_destroy_ah cmd;
2456         int ret;
2457
2458         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2459         if (ret)
2460                 return ret;
2461
2462         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2463 }
2464
2465 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2466 {
2467         struct ib_uverbs_attach_mcast cmd;
2468         struct ib_qp                 *qp;
2469         struct ib_uqp_object         *obj;
2470         struct ib_uverbs_mcast_entry *mcast;
2471         int                           ret;
2472
2473         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2474         if (ret)
2475                 return ret;
2476
2477         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2478         if (!qp)
2479                 return -EINVAL;
2480
2481         obj = qp->uobject;
2482
2483         mutex_lock(&obj->mcast_lock);
2484         list_for_each_entry(mcast, &obj->mcast_list, list)
2485                 if (cmd.mlid == mcast->lid &&
2486                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2487                         ret = 0;
2488                         goto out_put;
2489                 }
2490
2491         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2492         if (!mcast) {
2493                 ret = -ENOMEM;
2494                 goto out_put;
2495         }
2496
2497         mcast->lid = cmd.mlid;
2498         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2499
2500         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2501         if (!ret)
2502                 list_add_tail(&mcast->list, &obj->mcast_list);
2503         else
2504                 kfree(mcast);
2505
2506 out_put:
2507         mutex_unlock(&obj->mcast_lock);
2508         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2509                                 UVERBS_LOOKUP_READ);
2510
2511         return ret;
2512 }
2513
2514 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2515 {
2516         struct ib_uverbs_detach_mcast cmd;
2517         struct ib_uqp_object         *obj;
2518         struct ib_qp                 *qp;
2519         struct ib_uverbs_mcast_entry *mcast;
2520         int                           ret;
2521         bool                          found = false;
2522
2523         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2524         if (ret)
2525                 return ret;
2526
2527         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2528         if (!qp)
2529                 return -EINVAL;
2530
2531         obj = qp->uobject;
2532         mutex_lock(&obj->mcast_lock);
2533
2534         list_for_each_entry(mcast, &obj->mcast_list, list)
2535                 if (cmd.mlid == mcast->lid &&
2536                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2537                         list_del(&mcast->list);
2538                         kfree(mcast);
2539                         found = true;
2540                         break;
2541                 }
2542
2543         if (!found) {
2544                 ret = -EINVAL;
2545                 goto out_put;
2546         }
2547
2548         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2549
2550 out_put:
2551         mutex_unlock(&obj->mcast_lock);
2552         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2553                                 UVERBS_LOOKUP_READ);
2554         return ret;
2555 }
2556
2557 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2558 {
2559         struct ib_uflow_resources *resources;
2560
2561         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2562
2563         if (!resources)
2564                 return NULL;
2565
2566         if (!num_specs)
2567                 goto out;
2568
2569         resources->counters =
2570                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2571         resources->collection =
2572                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2573
2574         if (!resources->counters || !resources->collection)
2575                 goto err;
2576
2577 out:
2578         resources->max = num_specs;
2579         return resources;
2580
2581 err:
2582         kfree(resources->counters);
2583         kfree(resources);
2584
2585         return NULL;
2586 }
2587 EXPORT_SYMBOL(flow_resources_alloc);
2588
2589 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2590 {
2591         unsigned int i;
2592
2593         if (!uflow_res)
2594                 return;
2595
2596         for (i = 0; i < uflow_res->collection_num; i++)
2597                 atomic_dec(&uflow_res->collection[i]->usecnt);
2598
2599         for (i = 0; i < uflow_res->counters_num; i++)
2600                 atomic_dec(&uflow_res->counters[i]->usecnt);
2601
2602         kfree(uflow_res->collection);
2603         kfree(uflow_res->counters);
2604         kfree(uflow_res);
2605 }
2606 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2607
2608 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2609                         enum ib_flow_spec_type type,
2610                         void *ibobj)
2611 {
2612         WARN_ON(uflow_res->num >= uflow_res->max);
2613
2614         switch (type) {
2615         case IB_FLOW_SPEC_ACTION_HANDLE:
2616                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2617                 uflow_res->collection[uflow_res->collection_num++] =
2618                         (struct ib_flow_action *)ibobj;
2619                 break;
2620         case IB_FLOW_SPEC_ACTION_COUNT:
2621                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2622                 uflow_res->counters[uflow_res->counters_num++] =
2623                         (struct ib_counters *)ibobj;
2624                 break;
2625         default:
2626                 WARN_ON(1);
2627         }
2628
2629         uflow_res->num++;
2630 }
2631 EXPORT_SYMBOL(flow_resources_add);
2632
2633 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2634                                        struct ib_uverbs_flow_spec *kern_spec,
2635                                        union ib_flow_spec *ib_spec,
2636                                        struct ib_uflow_resources *uflow_res)
2637 {
2638         ib_spec->type = kern_spec->type;
2639         switch (ib_spec->type) {
2640         case IB_FLOW_SPEC_ACTION_TAG:
2641                 if (kern_spec->flow_tag.size !=
2642                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2643                         return -EINVAL;
2644
2645                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2646                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2647                 break;
2648         case IB_FLOW_SPEC_ACTION_DROP:
2649                 if (kern_spec->drop.size !=
2650                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2651                         return -EINVAL;
2652
2653                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2654                 break;
2655         case IB_FLOW_SPEC_ACTION_HANDLE:
2656                 if (kern_spec->action.size !=
2657                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2658                         return -EOPNOTSUPP;
2659                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2660                                                         UVERBS_OBJECT_FLOW_ACTION,
2661                                                         kern_spec->action.handle,
2662                                                         attrs);
2663                 if (!ib_spec->action.act)
2664                         return -EINVAL;
2665                 ib_spec->action.size =
2666                         sizeof(struct ib_flow_spec_action_handle);
2667                 flow_resources_add(uflow_res,
2668                                    IB_FLOW_SPEC_ACTION_HANDLE,
2669                                    ib_spec->action.act);
2670                 uobj_put_obj_read(ib_spec->action.act);
2671                 break;
2672         case IB_FLOW_SPEC_ACTION_COUNT:
2673                 if (kern_spec->flow_count.size !=
2674                         sizeof(struct ib_uverbs_flow_spec_action_count))
2675                         return -EINVAL;
2676                 ib_spec->flow_count.counters =
2677                         uobj_get_obj_read(counters,
2678                                           UVERBS_OBJECT_COUNTERS,
2679                                           kern_spec->flow_count.handle,
2680                                           attrs);
2681                 if (!ib_spec->flow_count.counters)
2682                         return -EINVAL;
2683                 ib_spec->flow_count.size =
2684                                 sizeof(struct ib_flow_spec_action_count);
2685                 flow_resources_add(uflow_res,
2686                                    IB_FLOW_SPEC_ACTION_COUNT,
2687                                    ib_spec->flow_count.counters);
2688                 uobj_put_obj_read(ib_spec->flow_count.counters);
2689                 break;
2690         default:
2691                 return -EINVAL;
2692         }
2693         return 0;
2694 }
2695
2696 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2697                                 u16 ib_real_filter_sz)
2698 {
2699         /*
2700          * User space filter structures must be 64 bit aligned, otherwise this
2701          * may pass, but we won't handle additional new attributes.
2702          */
2703
2704         if (kern_filter_size > ib_real_filter_sz) {
2705                 if (memchr_inv(kern_spec_filter +
2706                                ib_real_filter_sz, 0,
2707                                kern_filter_size - ib_real_filter_sz))
2708                         return -EINVAL;
2709                 return ib_real_filter_sz;
2710         }
2711         return kern_filter_size;
2712 }
2713
2714 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2715                                           const void *kern_spec_mask,
2716                                           const void *kern_spec_val,
2717                                           size_t kern_filter_sz,
2718                                           union ib_flow_spec *ib_spec)
2719 {
2720         ssize_t actual_filter_sz;
2721         ssize_t ib_filter_sz;
2722
2723         /* User flow spec size must be aligned to 4 bytes */
2724         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2725                 return -EINVAL;
2726
2727         ib_spec->type = type;
2728
2729         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2730                 return -EINVAL;
2731
2732         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2733         case IB_FLOW_SPEC_ETH:
2734                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2735                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2736                                                     kern_filter_sz,
2737                                                     ib_filter_sz);
2738                 if (actual_filter_sz <= 0)
2739                         return -EINVAL;
2740                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2741                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2742                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2743                 break;
2744         case IB_FLOW_SPEC_IPV4:
2745                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2746                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2747                                                     kern_filter_sz,
2748                                                     ib_filter_sz);
2749                 if (actual_filter_sz <= 0)
2750                         return -EINVAL;
2751                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2752                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2753                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2754                 break;
2755         case IB_FLOW_SPEC_IPV6:
2756                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2757                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2758                                                     kern_filter_sz,
2759                                                     ib_filter_sz);
2760                 if (actual_filter_sz <= 0)
2761                         return -EINVAL;
2762                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2763                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2764                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2765
2766                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2767                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2768                         return -EINVAL;
2769                 break;
2770         case IB_FLOW_SPEC_TCP:
2771         case IB_FLOW_SPEC_UDP:
2772                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2773                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2774                                                     kern_filter_sz,
2775                                                     ib_filter_sz);
2776                 if (actual_filter_sz <= 0)
2777                         return -EINVAL;
2778                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2779                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2780                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2781                 break;
2782         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2783                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2784                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2785                                                     kern_filter_sz,
2786                                                     ib_filter_sz);
2787                 if (actual_filter_sz <= 0)
2788                         return -EINVAL;
2789                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2790                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2791                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2792
2793                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2794                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2795                         return -EINVAL;
2796                 break;
2797         case IB_FLOW_SPEC_ESP:
2798                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2799                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2800                                                     kern_filter_sz,
2801                                                     ib_filter_sz);
2802                 if (actual_filter_sz <= 0)
2803                         return -EINVAL;
2804                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2805                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2806                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2807                 break;
2808         case IB_FLOW_SPEC_GRE:
2809                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2810                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2811                                                     kern_filter_sz,
2812                                                     ib_filter_sz);
2813                 if (actual_filter_sz <= 0)
2814                         return -EINVAL;
2815                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2816                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2817                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2818                 break;
2819         case IB_FLOW_SPEC_MPLS:
2820                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2821                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2822                                                     kern_filter_sz,
2823                                                     ib_filter_sz);
2824                 if (actual_filter_sz <= 0)
2825                         return -EINVAL;
2826                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2827                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2828                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2829                 break;
2830         default:
2831                 return -EINVAL;
2832         }
2833         return 0;
2834 }
2835
2836 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2837                                        union ib_flow_spec *ib_spec)
2838 {
2839         size_t kern_filter_sz;
2840         void *kern_spec_mask;
2841         void *kern_spec_val;
2842
2843         if (check_sub_overflow((size_t)kern_spec->hdr.size,
2844                                sizeof(struct ib_uverbs_flow_spec_hdr),
2845                                &kern_filter_sz))
2846                 return -EINVAL;
2847
2848         kern_filter_sz /= 2;
2849
2850         kern_spec_val = (void *)kern_spec +
2851                 sizeof(struct ib_uverbs_flow_spec_hdr);
2852         kern_spec_mask = kern_spec_val + kern_filter_sz;
2853
2854         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2855                                                      kern_spec_mask,
2856                                                      kern_spec_val,
2857                                                      kern_filter_sz, ib_spec);
2858 }
2859
2860 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2861                                 struct ib_uverbs_flow_spec *kern_spec,
2862                                 union ib_flow_spec *ib_spec,
2863                                 struct ib_uflow_resources *uflow_res)
2864 {
2865         if (kern_spec->reserved)
2866                 return -EINVAL;
2867
2868         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2869                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2870                                                    uflow_res);
2871         else
2872                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2873 }
2874
2875 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2876 {
2877         struct ib_uverbs_ex_create_wq cmd;
2878         struct ib_uverbs_ex_create_wq_resp resp = {};
2879         struct ib_uwq_object           *obj;
2880         int err = 0;
2881         struct ib_cq *cq;
2882         struct ib_pd *pd;
2883         struct ib_wq *wq;
2884         struct ib_wq_init_attr wq_init_attr = {};
2885         struct ib_device *ib_dev;
2886
2887         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2888         if (err)
2889                 return err;
2890
2891         if (cmd.comp_mask)
2892                 return -EOPNOTSUPP;
2893
2894         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2895                                                  &ib_dev);
2896         if (IS_ERR(obj))
2897                 return PTR_ERR(obj);
2898
2899         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2900         if (!pd) {
2901                 err = -EINVAL;
2902                 goto err_uobj;
2903         }
2904
2905         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2906         if (!cq) {
2907                 err = -EINVAL;
2908                 goto err_put_pd;
2909         }
2910
2911         wq_init_attr.cq = cq;
2912         wq_init_attr.max_sge = cmd.max_sge;
2913         wq_init_attr.max_wr = cmd.max_wr;
2914         wq_init_attr.wq_type = cmd.wq_type;
2915         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2916         wq_init_attr.create_flags = cmd.create_flags;
2917         INIT_LIST_HEAD(&obj->uevent.event_list);
2918         obj->uevent.uobject.user_handle = cmd.user_handle;
2919
2920         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2921         if (IS_ERR(wq)) {
2922                 err = PTR_ERR(wq);
2923                 goto err_put_cq;
2924         }
2925
2926         wq->uobject = obj;
2927         obj->uevent.uobject.object = wq;
2928         wq->wq_type = wq_init_attr.wq_type;
2929         wq->cq = cq;
2930         wq->pd = pd;
2931         wq->device = pd->device;
2932         atomic_set(&wq->usecnt, 0);
2933         atomic_inc(&pd->usecnt);
2934         atomic_inc(&cq->usecnt);
2935         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
2936         if (obj->uevent.event_file)
2937                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
2938
2939         uobj_put_obj_read(pd);
2940         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2941                                 UVERBS_LOOKUP_READ);
2942         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
2943
2944         resp.wq_handle = obj->uevent.uobject.id;
2945         resp.max_sge = wq_init_attr.max_sge;
2946         resp.max_wr = wq_init_attr.max_wr;
2947         resp.wqn = wq->wq_num;
2948         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2949         return uverbs_response(attrs, &resp, sizeof(resp));
2950
2951 err_put_cq:
2952         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
2953                                 UVERBS_LOOKUP_READ);
2954 err_put_pd:
2955         uobj_put_obj_read(pd);
2956 err_uobj:
2957         uobj_alloc_abort(&obj->uevent.uobject, attrs);
2958
2959         return err;
2960 }
2961
2962 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
2963 {
2964         struct ib_uverbs_ex_destroy_wq  cmd;
2965         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2966         struct ib_uobject               *uobj;
2967         struct ib_uwq_object            *obj;
2968         int                             ret;
2969
2970         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2971         if (ret)
2972                 return ret;
2973
2974         if (cmd.comp_mask)
2975                 return -EOPNOTSUPP;
2976
2977         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2978         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
2979         if (IS_ERR(uobj))
2980                 return PTR_ERR(uobj);
2981
2982         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
2983         resp.events_reported = obj->uevent.events_reported;
2984
2985         uobj_put_destroy(uobj);
2986
2987         return uverbs_response(attrs, &resp, sizeof(resp));
2988 }
2989
2990 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
2991 {
2992         struct ib_uverbs_ex_modify_wq cmd;
2993         struct ib_wq *wq;
2994         struct ib_wq_attr wq_attr = {};
2995         int ret;
2996
2997         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2998         if (ret)
2999                 return ret;
3000
3001         if (!cmd.attr_mask)
3002                 return -EINVAL;
3003
3004         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3005                 return -EINVAL;
3006
3007         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3008         if (!wq)
3009                 return -EINVAL;
3010
3011         if (cmd.attr_mask & IB_WQ_FLAGS) {
3012                 wq_attr.flags = cmd.flags;
3013                 wq_attr.flags_mask = cmd.flags_mask;
3014         }
3015
3016         if (cmd.attr_mask & IB_WQ_CUR_STATE) {
3017                 if (cmd.curr_wq_state > IB_WQS_ERR)
3018                         return -EINVAL;
3019
3020                 wq_attr.curr_wq_state = cmd.curr_wq_state;
3021         } else {
3022                 wq_attr.curr_wq_state = wq->state;
3023         }
3024
3025         if (cmd.attr_mask & IB_WQ_STATE) {
3026                 if (cmd.wq_state > IB_WQS_ERR)
3027                         return -EINVAL;
3028
3029                 wq_attr.wq_state = cmd.wq_state;
3030         } else {
3031                 wq_attr.wq_state = wq_attr.curr_wq_state;
3032         }
3033
3034         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3035                                         &attrs->driver_udata);
3036         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3037                                 UVERBS_LOOKUP_READ);
3038         return ret;
3039 }
3040
3041 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3042 {
3043         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3044         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3045         struct ib_uobject *uobj;
3046         int err;
3047         struct ib_rwq_ind_table_init_attr init_attr = {};
3048         struct ib_rwq_ind_table *rwq_ind_tbl;
3049         struct ib_wq **wqs = NULL;
3050         u32 *wqs_handles = NULL;
3051         struct ib_wq    *wq = NULL;
3052         int i, num_read_wqs;
3053         u32 num_wq_handles;
3054         struct uverbs_req_iter iter;
3055         struct ib_device *ib_dev;
3056
3057         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3058         if (err)
3059                 return err;
3060
3061         if (cmd.comp_mask)
3062                 return -EOPNOTSUPP;
3063
3064         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3065                 return -EINVAL;
3066
3067         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3068         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3069                               GFP_KERNEL);
3070         if (!wqs_handles)
3071                 return -ENOMEM;
3072
3073         err = uverbs_request_next(&iter, wqs_handles,
3074                                   num_wq_handles * sizeof(__u32));
3075         if (err)
3076                 goto err_free;
3077
3078         err = uverbs_request_finish(&iter);
3079         if (err)
3080                 goto err_free;
3081
3082         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3083         if (!wqs) {
3084                 err = -ENOMEM;
3085                 goto  err_free;
3086         }
3087
3088         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3089                         num_read_wqs++) {
3090                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3091                                        wqs_handles[num_read_wqs], attrs);
3092                 if (!wq) {
3093                         err = -EINVAL;
3094                         goto put_wqs;
3095                 }
3096
3097                 wqs[num_read_wqs] = wq;
3098                 atomic_inc(&wqs[num_read_wqs]->usecnt);
3099         }
3100
3101         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3102         if (IS_ERR(uobj)) {
3103                 err = PTR_ERR(uobj);
3104                 goto put_wqs;
3105         }
3106
3107         rwq_ind_tbl = rdma_zalloc_drv_obj(ib_dev, ib_rwq_ind_table);
3108         if (!rwq_ind_tbl) {
3109                 err = -ENOMEM;
3110                 goto err_uobj;
3111         }
3112
3113         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3114         init_attr.ind_tbl = wqs;
3115
3116         rwq_ind_tbl->ind_tbl = wqs;
3117         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3118         rwq_ind_tbl->uobject = uobj;
3119         uobj->object = rwq_ind_tbl;
3120         rwq_ind_tbl->device = ib_dev;
3121         atomic_set(&rwq_ind_tbl->usecnt, 0);
3122
3123         err = ib_dev->ops.create_rwq_ind_table(rwq_ind_tbl, &init_attr,
3124                                                &attrs->driver_udata);
3125         if (err)
3126                 goto err_create;
3127
3128         for (i = 0; i < num_wq_handles; i++)
3129                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3130                                         UVERBS_LOOKUP_READ);
3131         kfree(wqs_handles);
3132         uobj_finalize_uobj_create(uobj, attrs);
3133
3134         resp.ind_tbl_handle = uobj->id;
3135         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3136         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3137         return uverbs_response(attrs, &resp, sizeof(resp));
3138
3139 err_create:
3140         kfree(rwq_ind_tbl);
3141 err_uobj:
3142         uobj_alloc_abort(uobj, attrs);
3143 put_wqs:
3144         for (i = 0; i < num_read_wqs; i++) {
3145                 rdma_lookup_put_uobject(&wqs[i]->uobject->uevent.uobject,
3146                                         UVERBS_LOOKUP_READ);
3147                 atomic_dec(&wqs[i]->usecnt);
3148         }
3149 err_free:
3150         kfree(wqs_handles);
3151         kfree(wqs);
3152         return err;
3153 }
3154
3155 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3156 {
3157         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3158         int ret;
3159
3160         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3161         if (ret)
3162                 return ret;
3163
3164         if (cmd.comp_mask)
3165                 return -EOPNOTSUPP;
3166
3167         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3168                                     cmd.ind_tbl_handle, attrs);
3169 }
3170
3171 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3172 {
3173         struct ib_uverbs_create_flow      cmd;
3174         struct ib_uverbs_create_flow_resp resp = {};
3175         struct ib_uobject                 *uobj;
3176         struct ib_flow                    *flow_id;
3177         struct ib_uverbs_flow_attr        *kern_flow_attr;
3178         struct ib_flow_attr               *flow_attr;
3179         struct ib_qp                      *qp;
3180         struct ib_uflow_resources         *uflow_res;
3181         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3182         struct uverbs_req_iter iter;
3183         int err;
3184         void *ib_spec;
3185         int i;
3186         struct ib_device *ib_dev;
3187
3188         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3189         if (err)
3190                 return err;
3191
3192         if (cmd.comp_mask)
3193                 return -EINVAL;
3194
3195         if (!capable(CAP_NET_RAW))
3196                 return -EPERM;
3197
3198         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3199                 return -EINVAL;
3200
3201         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3202             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3203              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3204                 return -EINVAL;
3205
3206         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3207                 return -EINVAL;
3208
3209         if (cmd.flow_attr.size >
3210             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3211                 return -EINVAL;
3212
3213         if (cmd.flow_attr.reserved[0] ||
3214             cmd.flow_attr.reserved[1])
3215                 return -EINVAL;
3216
3217         if (cmd.flow_attr.num_of_specs) {
3218                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3219                                          GFP_KERNEL);
3220                 if (!kern_flow_attr)
3221                         return -ENOMEM;
3222
3223                 *kern_flow_attr = cmd.flow_attr;
3224                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3225                                           cmd.flow_attr.size);
3226                 if (err)
3227                         goto err_free_attr;
3228         } else {
3229                 kern_flow_attr = &cmd.flow_attr;
3230         }
3231
3232         err = uverbs_request_finish(&iter);
3233         if (err)
3234                 goto err_free_attr;
3235
3236         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3237         if (IS_ERR(uobj)) {
3238                 err = PTR_ERR(uobj);
3239                 goto err_free_attr;
3240         }
3241
3242         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3243         if (!qp) {
3244                 err = -EINVAL;
3245                 goto err_uobj;
3246         }
3247
3248         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3249                 err = -EINVAL;
3250                 goto err_put;
3251         }
3252
3253         flow_attr = kzalloc(struct_size(flow_attr, flows,
3254                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3255         if (!flow_attr) {
3256                 err = -ENOMEM;
3257                 goto err_put;
3258         }
3259         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3260         if (!uflow_res) {
3261                 err = -ENOMEM;
3262                 goto err_free_flow_attr;
3263         }
3264
3265         flow_attr->type = kern_flow_attr->type;
3266         flow_attr->priority = kern_flow_attr->priority;
3267         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3268         flow_attr->port = kern_flow_attr->port;
3269         flow_attr->flags = kern_flow_attr->flags;
3270         flow_attr->size = sizeof(*flow_attr);
3271
3272         kern_spec = kern_flow_attr->flow_specs;
3273         ib_spec = flow_attr + 1;
3274         for (i = 0; i < flow_attr->num_of_specs &&
3275                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3276                         cmd.flow_attr.size >= kern_spec->size;
3277              i++) {
3278                 err = kern_spec_to_ib_spec(
3279                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3280                                 ib_spec, uflow_res);
3281                 if (err)
3282                         goto err_free;
3283
3284                 flow_attr->size +=
3285                         ((union ib_flow_spec *) ib_spec)->size;
3286                 cmd.flow_attr.size -= kern_spec->size;
3287                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3288                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3289         }
3290         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3291                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3292                         i, cmd.flow_attr.size);
3293                 err = -EINVAL;
3294                 goto err_free;
3295         }
3296
3297         flow_id = qp->device->ops.create_flow(qp, flow_attr,
3298                                               &attrs->driver_udata);
3299
3300         if (IS_ERR(flow_id)) {
3301                 err = PTR_ERR(flow_id);
3302                 goto err_free;
3303         }
3304
3305         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3306
3307         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3308                                 UVERBS_LOOKUP_READ);
3309         kfree(flow_attr);
3310
3311         if (cmd.flow_attr.num_of_specs)
3312                 kfree(kern_flow_attr);
3313         uobj_finalize_uobj_create(uobj, attrs);
3314
3315         resp.flow_handle = uobj->id;
3316         return uverbs_response(attrs, &resp, sizeof(resp));
3317
3318 err_free:
3319         ib_uverbs_flow_resources_free(uflow_res);
3320 err_free_flow_attr:
3321         kfree(flow_attr);
3322 err_put:
3323         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3324                                 UVERBS_LOOKUP_READ);
3325 err_uobj:
3326         uobj_alloc_abort(uobj, attrs);
3327 err_free_attr:
3328         if (cmd.flow_attr.num_of_specs)
3329                 kfree(kern_flow_attr);
3330         return err;
3331 }
3332
3333 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3334 {
3335         struct ib_uverbs_destroy_flow   cmd;
3336         int                             ret;
3337
3338         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3339         if (ret)
3340                 return ret;
3341
3342         if (cmd.comp_mask)
3343                 return -EINVAL;
3344
3345         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3346 }
3347
3348 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3349                                 struct ib_uverbs_create_xsrq *cmd,
3350                                 struct ib_udata *udata)
3351 {
3352         struct ib_uverbs_create_srq_resp resp = {};
3353         struct ib_usrq_object           *obj;
3354         struct ib_pd                    *pd;
3355         struct ib_srq                   *srq;
3356         struct ib_srq_init_attr          attr;
3357         int ret;
3358         struct ib_uobject *xrcd_uobj;
3359         struct ib_device *ib_dev;
3360
3361         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3362                                                   &ib_dev);
3363         if (IS_ERR(obj))
3364                 return PTR_ERR(obj);
3365
3366         if (cmd->srq_type == IB_SRQT_TM)
3367                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3368
3369         if (cmd->srq_type == IB_SRQT_XRC) {
3370                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3371                                           attrs);
3372                 if (IS_ERR(xrcd_uobj)) {
3373                         ret = -EINVAL;
3374                         goto err;
3375                 }
3376
3377                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3378                 if (!attr.ext.xrc.xrcd) {
3379                         ret = -EINVAL;
3380                         goto err_put_xrcd;
3381                 }
3382
3383                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3384                 atomic_inc(&obj->uxrcd->refcnt);
3385         }
3386
3387         if (ib_srq_has_cq(cmd->srq_type)) {
3388                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3389                                                 cmd->cq_handle, attrs);
3390                 if (!attr.ext.cq) {
3391                         ret = -EINVAL;
3392                         goto err_put_xrcd;
3393                 }
3394         }
3395
3396         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3397         if (!pd) {
3398                 ret = -EINVAL;
3399                 goto err_put_cq;
3400         }
3401
3402         attr.event_handler  = ib_uverbs_srq_event_handler;
3403         attr.srq_type       = cmd->srq_type;
3404         attr.attr.max_wr    = cmd->max_wr;
3405         attr.attr.max_sge   = cmd->max_sge;
3406         attr.attr.srq_limit = cmd->srq_limit;
3407
3408         INIT_LIST_HEAD(&obj->uevent.event_list);
3409         obj->uevent.uobject.user_handle = cmd->user_handle;
3410
3411         srq = ib_create_srq_user(pd, &attr, obj, udata);
3412         if (IS_ERR(srq)) {
3413                 ret = PTR_ERR(srq);
3414                 goto err_put_pd;
3415         }
3416
3417         obj->uevent.uobject.object = srq;
3418         obj->uevent.uobject.user_handle = cmd->user_handle;
3419         obj->uevent.event_file = READ_ONCE(attrs->ufile->default_async_file);
3420         if (obj->uevent.event_file)
3421                 uverbs_uobject_get(&obj->uevent.event_file->uobj);
3422
3423         if (cmd->srq_type == IB_SRQT_XRC)
3424                 resp.srqn = srq->ext.xrc.srq_num;
3425
3426         if (cmd->srq_type == IB_SRQT_XRC)
3427                 uobj_put_read(xrcd_uobj);
3428
3429         if (ib_srq_has_cq(cmd->srq_type))
3430                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3431                                         UVERBS_LOOKUP_READ);
3432
3433         uobj_put_obj_read(pd);
3434         uobj_finalize_uobj_create(&obj->uevent.uobject, attrs);
3435
3436         resp.srq_handle = obj->uevent.uobject.id;
3437         resp.max_wr = attr.attr.max_wr;
3438         resp.max_sge = attr.attr.max_sge;
3439         return uverbs_response(attrs, &resp, sizeof(resp));
3440
3441 err_put_pd:
3442         uobj_put_obj_read(pd);
3443 err_put_cq:
3444         if (ib_srq_has_cq(cmd->srq_type))
3445                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3446                                         UVERBS_LOOKUP_READ);
3447
3448 err_put_xrcd:
3449         if (cmd->srq_type == IB_SRQT_XRC) {
3450                 atomic_dec(&obj->uxrcd->refcnt);
3451                 uobj_put_read(xrcd_uobj);
3452         }
3453
3454 err:
3455         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3456         return ret;
3457 }
3458
3459 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3460 {
3461         struct ib_uverbs_create_srq      cmd;
3462         struct ib_uverbs_create_xsrq     xcmd;
3463         int ret;
3464
3465         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3466         if (ret)
3467                 return ret;
3468
3469         memset(&xcmd, 0, sizeof(xcmd));
3470         xcmd.response    = cmd.response;
3471         xcmd.user_handle = cmd.user_handle;
3472         xcmd.srq_type    = IB_SRQT_BASIC;
3473         xcmd.pd_handle   = cmd.pd_handle;
3474         xcmd.max_wr      = cmd.max_wr;
3475         xcmd.max_sge     = cmd.max_sge;
3476         xcmd.srq_limit   = cmd.srq_limit;
3477
3478         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3479 }
3480
3481 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3482 {
3483         struct ib_uverbs_create_xsrq     cmd;
3484         int ret;
3485
3486         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3487         if (ret)
3488                 return ret;
3489
3490         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3491 }
3492
3493 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3494 {
3495         struct ib_uverbs_modify_srq cmd;
3496         struct ib_srq              *srq;
3497         struct ib_srq_attr          attr;
3498         int                         ret;
3499
3500         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3501         if (ret)
3502                 return ret;
3503
3504         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3505         if (!srq)
3506                 return -EINVAL;
3507
3508         attr.max_wr    = cmd.max_wr;
3509         attr.srq_limit = cmd.srq_limit;
3510
3511         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3512                                           &attrs->driver_udata);
3513
3514         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3515                                 UVERBS_LOOKUP_READ);
3516
3517         return ret;
3518 }
3519
3520 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3521 {
3522         struct ib_uverbs_query_srq      cmd;
3523         struct ib_uverbs_query_srq_resp resp;
3524         struct ib_srq_attr              attr;
3525         struct ib_srq                   *srq;
3526         int                             ret;
3527
3528         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3529         if (ret)
3530                 return ret;
3531
3532         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3533         if (!srq)
3534                 return -EINVAL;
3535
3536         ret = ib_query_srq(srq, &attr);
3537
3538         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3539                                 UVERBS_LOOKUP_READ);
3540
3541         if (ret)
3542                 return ret;
3543
3544         memset(&resp, 0, sizeof resp);
3545
3546         resp.max_wr    = attr.max_wr;
3547         resp.max_sge   = attr.max_sge;
3548         resp.srq_limit = attr.srq_limit;
3549
3550         return uverbs_response(attrs, &resp, sizeof(resp));
3551 }
3552
3553 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3554 {
3555         struct ib_uverbs_destroy_srq      cmd;
3556         struct ib_uverbs_destroy_srq_resp resp;
3557         struct ib_uobject                *uobj;
3558         struct ib_uevent_object          *obj;
3559         int ret;
3560
3561         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3562         if (ret)
3563                 return ret;
3564
3565         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3566         if (IS_ERR(uobj))
3567                 return PTR_ERR(uobj);
3568
3569         obj = container_of(uobj, struct ib_uevent_object, uobject);
3570         memset(&resp, 0, sizeof(resp));
3571         resp.events_reported = obj->events_reported;
3572
3573         uobj_put_destroy(uobj);
3574
3575         return uverbs_response(attrs, &resp, sizeof(resp));
3576 }
3577
3578 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3579 {
3580         struct ib_uverbs_ex_query_device_resp resp = {};
3581         struct ib_uverbs_ex_query_device  cmd;
3582         struct ib_device_attr attr = {0};
3583         struct ib_ucontext *ucontext;
3584         struct ib_device *ib_dev;
3585         int err;
3586
3587         ucontext = ib_uverbs_get_ucontext(attrs);
3588         if (IS_ERR(ucontext))
3589                 return PTR_ERR(ucontext);
3590         ib_dev = ucontext->device;
3591
3592         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3593         if (err)
3594                 return err;
3595
3596         if (cmd.comp_mask)
3597                 return -EINVAL;
3598
3599         if (cmd.reserved)
3600                 return -EINVAL;
3601
3602         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3603         if (err)
3604                 return err;
3605
3606         copy_query_dev_fields(ucontext, &resp.base, &attr);
3607
3608         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3609         resp.odp_caps.per_transport_caps.rc_odp_caps =
3610                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3611         resp.odp_caps.per_transport_caps.uc_odp_caps =
3612                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3613         resp.odp_caps.per_transport_caps.ud_odp_caps =
3614                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3615         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3616
3617         resp.timestamp_mask = attr.timestamp_mask;
3618         resp.hca_core_clock = attr.hca_core_clock;
3619         resp.device_cap_flags_ex = attr.device_cap_flags;
3620         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3621         resp.rss_caps.max_rwq_indirection_tables =
3622                 attr.rss_caps.max_rwq_indirection_tables;
3623         resp.rss_caps.max_rwq_indirection_table_size =
3624                 attr.rss_caps.max_rwq_indirection_table_size;
3625         resp.max_wq_type_rq = attr.max_wq_type_rq;
3626         resp.raw_packet_caps = attr.raw_packet_caps;
3627         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3628         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3629         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3630         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3631         resp.tm_caps.flags              = attr.tm_caps.flags;
3632         resp.cq_moderation_caps.max_cq_moderation_count  =
3633                 attr.cq_caps.max_cq_moderation_count;
3634         resp.cq_moderation_caps.max_cq_moderation_period =
3635                 attr.cq_caps.max_cq_moderation_period;
3636         resp.max_dm_size = attr.max_dm_size;
3637         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3638
3639         return uverbs_response(attrs, &resp, sizeof(resp));
3640 }
3641
3642 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3643 {
3644         struct ib_uverbs_ex_modify_cq cmd;
3645         struct ib_cq *cq;
3646         int ret;
3647
3648         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3649         if (ret)
3650                 return ret;
3651
3652         if (!cmd.attr_mask || cmd.reserved)
3653                 return -EINVAL;
3654
3655         if (cmd.attr_mask > IB_CQ_MODERATE)
3656                 return -EOPNOTSUPP;
3657
3658         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3659         if (!cq)
3660                 return -EINVAL;
3661
3662         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3663
3664         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3665                                 UVERBS_LOOKUP_READ);
3666         return ret;
3667 }
3668
3669 /*
3670  * Describe the input structs for write(). Some write methods have an input
3671  * only struct, most have an input and output. If the struct has an output then
3672  * the 'response' u64 must be the first field in the request structure.
3673  *
3674  * If udata is present then both the request and response structs have a
3675  * trailing driver_data flex array. In this case the size of the base struct
3676  * cannot be changed.
3677  */
3678 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3679         .write.has_resp = 1 +                                                  \
3680                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3681                           BUILD_BUG_ON_ZERO(sizeof_field(req, response) !=    \
3682                                             sizeof(u64)),                      \
3683         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3684
3685 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3686
3687 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3688         UAPI_DEF_WRITE_IO(req, resp),                                          \
3689                 .write.has_udata =                                             \
3690                         1 +                                                    \
3691                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3692                                           sizeof(req)) +                       \
3693                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3694                                           sizeof(resp))
3695
3696 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3697         UAPI_DEF_WRITE_I(req),                                                 \
3698                 .write.has_udata =                                             \
3699                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3700                                               sizeof(req))
3701
3702 /*
3703  * The _EX versions are for use with WRITE_EX and allow the last struct member
3704  * to be specified. Buffers that do not include that member will be rejected.
3705  */
3706 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3707         .write.has_resp = 1,                                                   \
3708         .write.req_size = offsetofend(req, req_last_member),                   \
3709         .write.resp_size = offsetofend(resp, resp_last_member)
3710
3711 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3712         .write.req_size = offsetofend(req, req_last_member)
3713
3714 const struct uapi_definition uverbs_def_write_intf[] = {
3715         DECLARE_UVERBS_OBJECT(
3716                 UVERBS_OBJECT_AH,
3717                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3718                                      ib_uverbs_create_ah,
3719                                      UAPI_DEF_WRITE_UDATA_IO(
3720                                              struct ib_uverbs_create_ah,
3721                                              struct ib_uverbs_create_ah_resp),
3722                                      UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3723                 DECLARE_UVERBS_WRITE(
3724                         IB_USER_VERBS_CMD_DESTROY_AH,
3725                         ib_uverbs_destroy_ah,
3726                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3727                         UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3728
3729         DECLARE_UVERBS_OBJECT(
3730                 UVERBS_OBJECT_COMP_CHANNEL,
3731                 DECLARE_UVERBS_WRITE(
3732                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3733                         ib_uverbs_create_comp_channel,
3734                         UAPI_DEF_WRITE_IO(
3735                                 struct ib_uverbs_create_comp_channel,
3736                                 struct ib_uverbs_create_comp_channel_resp))),
3737
3738         DECLARE_UVERBS_OBJECT(
3739                 UVERBS_OBJECT_CQ,
3740                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3741                                      ib_uverbs_create_cq,
3742                                      UAPI_DEF_WRITE_UDATA_IO(
3743                                              struct ib_uverbs_create_cq,
3744                                              struct ib_uverbs_create_cq_resp),
3745                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3746                 DECLARE_UVERBS_WRITE(
3747                         IB_USER_VERBS_CMD_DESTROY_CQ,
3748                         ib_uverbs_destroy_cq,
3749                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3750                                           struct ib_uverbs_destroy_cq_resp),
3751                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3752                 DECLARE_UVERBS_WRITE(
3753                         IB_USER_VERBS_CMD_POLL_CQ,
3754                         ib_uverbs_poll_cq,
3755                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3756                                           struct ib_uverbs_poll_cq_resp),
3757                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3758                 DECLARE_UVERBS_WRITE(
3759                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3760                         ib_uverbs_req_notify_cq,
3761                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3762                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3763                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3764                                      ib_uverbs_resize_cq,
3765                                      UAPI_DEF_WRITE_UDATA_IO(
3766                                              struct ib_uverbs_resize_cq,
3767                                              struct ib_uverbs_resize_cq_resp),
3768                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3769                 DECLARE_UVERBS_WRITE_EX(
3770                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3771                         ib_uverbs_ex_create_cq,
3772                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3773                                              reserved,
3774                                              struct ib_uverbs_ex_create_cq_resp,
3775                                              response_length),
3776                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3777                 DECLARE_UVERBS_WRITE_EX(
3778                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3779                         ib_uverbs_ex_modify_cq,
3780                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3781                         UAPI_DEF_METHOD_NEEDS_FN(modify_cq))),
3782
3783         DECLARE_UVERBS_OBJECT(
3784                 UVERBS_OBJECT_DEVICE,
3785                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3786                                      ib_uverbs_get_context,
3787                                      UAPI_DEF_WRITE_UDATA_IO(
3788                                              struct ib_uverbs_get_context,
3789                                              struct ib_uverbs_get_context_resp)),
3790                 DECLARE_UVERBS_WRITE(
3791                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3792                         ib_uverbs_query_device,
3793                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3794                                           struct ib_uverbs_query_device_resp)),
3795                 DECLARE_UVERBS_WRITE(
3796                         IB_USER_VERBS_CMD_QUERY_PORT,
3797                         ib_uverbs_query_port,
3798                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3799                                           struct ib_uverbs_query_port_resp),
3800                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3801                 DECLARE_UVERBS_WRITE_EX(
3802                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3803                         ib_uverbs_ex_query_device,
3804                         UAPI_DEF_WRITE_IO_EX(
3805                                 struct ib_uverbs_ex_query_device,
3806                                 reserved,
3807                                 struct ib_uverbs_ex_query_device_resp,
3808                                 response_length),
3809                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3810                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3811                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3812
3813         DECLARE_UVERBS_OBJECT(
3814                 UVERBS_OBJECT_FLOW,
3815                 DECLARE_UVERBS_WRITE_EX(
3816                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3817                         ib_uverbs_ex_create_flow,
3818                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3819                                              flow_attr,
3820                                              struct ib_uverbs_create_flow_resp,
3821                                              flow_handle),
3822                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3823                 DECLARE_UVERBS_WRITE_EX(
3824                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3825                         ib_uverbs_ex_destroy_flow,
3826                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3827                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3828
3829         DECLARE_UVERBS_OBJECT(
3830                 UVERBS_OBJECT_MR,
3831                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3832                                      ib_uverbs_dereg_mr,
3833                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3834                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3835                 DECLARE_UVERBS_WRITE(
3836                         IB_USER_VERBS_CMD_REG_MR,
3837                         ib_uverbs_reg_mr,
3838                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3839                                                 struct ib_uverbs_reg_mr_resp),
3840                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3841                 DECLARE_UVERBS_WRITE(
3842                         IB_USER_VERBS_CMD_REREG_MR,
3843                         ib_uverbs_rereg_mr,
3844                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3845                                                 struct ib_uverbs_rereg_mr_resp),
3846                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3847
3848         DECLARE_UVERBS_OBJECT(
3849                 UVERBS_OBJECT_MW,
3850                 DECLARE_UVERBS_WRITE(
3851                         IB_USER_VERBS_CMD_ALLOC_MW,
3852                         ib_uverbs_alloc_mw,
3853                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3854                                                 struct ib_uverbs_alloc_mw_resp),
3855                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3856                 DECLARE_UVERBS_WRITE(
3857                         IB_USER_VERBS_CMD_DEALLOC_MW,
3858                         ib_uverbs_dealloc_mw,
3859                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3860                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3861
3862         DECLARE_UVERBS_OBJECT(
3863                 UVERBS_OBJECT_PD,
3864                 DECLARE_UVERBS_WRITE(
3865                         IB_USER_VERBS_CMD_ALLOC_PD,
3866                         ib_uverbs_alloc_pd,
3867                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3868                                                 struct ib_uverbs_alloc_pd_resp),
3869                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3870                 DECLARE_UVERBS_WRITE(
3871                         IB_USER_VERBS_CMD_DEALLOC_PD,
3872                         ib_uverbs_dealloc_pd,
3873                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3874                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3875
3876         DECLARE_UVERBS_OBJECT(
3877                 UVERBS_OBJECT_QP,
3878                 DECLARE_UVERBS_WRITE(
3879                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3880                         ib_uverbs_attach_mcast,
3881                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3882                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3883                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3884                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3885                                      ib_uverbs_create_qp,
3886                                      UAPI_DEF_WRITE_UDATA_IO(
3887                                              struct ib_uverbs_create_qp,
3888                                              struct ib_uverbs_create_qp_resp),
3889                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3890                 DECLARE_UVERBS_WRITE(
3891                         IB_USER_VERBS_CMD_DESTROY_QP,
3892                         ib_uverbs_destroy_qp,
3893                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3894                                           struct ib_uverbs_destroy_qp_resp),
3895                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3896                 DECLARE_UVERBS_WRITE(
3897                         IB_USER_VERBS_CMD_DETACH_MCAST,
3898                         ib_uverbs_detach_mcast,
3899                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3900                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3901                 DECLARE_UVERBS_WRITE(
3902                         IB_USER_VERBS_CMD_MODIFY_QP,
3903                         ib_uverbs_modify_qp,
3904                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3905                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3906                 DECLARE_UVERBS_WRITE(
3907                         IB_USER_VERBS_CMD_POST_RECV,
3908                         ib_uverbs_post_recv,
3909                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3910                                           struct ib_uverbs_post_recv_resp),
3911                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3912                 DECLARE_UVERBS_WRITE(
3913                         IB_USER_VERBS_CMD_POST_SEND,
3914                         ib_uverbs_post_send,
3915                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3916                                           struct ib_uverbs_post_send_resp),
3917                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3918                 DECLARE_UVERBS_WRITE(
3919                         IB_USER_VERBS_CMD_QUERY_QP,
3920                         ib_uverbs_query_qp,
3921                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3922                                           struct ib_uverbs_query_qp_resp),
3923                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3924                 DECLARE_UVERBS_WRITE_EX(
3925                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3926                         ib_uverbs_ex_create_qp,
3927                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3928                                              comp_mask,
3929                                              struct ib_uverbs_ex_create_qp_resp,
3930                                              response_length),
3931                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3932                 DECLARE_UVERBS_WRITE_EX(
3933                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3934                         ib_uverbs_ex_modify_qp,
3935                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3936                                              base,
3937                                              struct ib_uverbs_ex_modify_qp_resp,
3938                                              response_length),
3939                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3940
3941         DECLARE_UVERBS_OBJECT(
3942                 UVERBS_OBJECT_RWQ_IND_TBL,
3943                 DECLARE_UVERBS_WRITE_EX(
3944                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
3945                         ib_uverbs_ex_create_rwq_ind_table,
3946                         UAPI_DEF_WRITE_IO_EX(
3947                                 struct ib_uverbs_ex_create_rwq_ind_table,
3948                                 log_ind_tbl_size,
3949                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
3950                                 ind_tbl_num),
3951                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
3952                 DECLARE_UVERBS_WRITE_EX(
3953                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
3954                         ib_uverbs_ex_destroy_rwq_ind_table,
3955                         UAPI_DEF_WRITE_I(
3956                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
3957                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
3958
3959         DECLARE_UVERBS_OBJECT(
3960                 UVERBS_OBJECT_WQ,
3961                 DECLARE_UVERBS_WRITE_EX(
3962                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
3963                         ib_uverbs_ex_create_wq,
3964                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
3965                                              max_sge,
3966                                              struct ib_uverbs_ex_create_wq_resp,
3967                                              wqn),
3968                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
3969                 DECLARE_UVERBS_WRITE_EX(
3970                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
3971                         ib_uverbs_ex_destroy_wq,
3972                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
3973                                              wq_handle,
3974                                              struct ib_uverbs_ex_destroy_wq_resp,
3975                                              reserved),
3976                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
3977                 DECLARE_UVERBS_WRITE_EX(
3978                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
3979                         ib_uverbs_ex_modify_wq,
3980                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
3981                                             curr_wq_state),
3982                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
3983
3984         DECLARE_UVERBS_OBJECT(
3985                 UVERBS_OBJECT_SRQ,
3986                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
3987                                      ib_uverbs_create_srq,
3988                                      UAPI_DEF_WRITE_UDATA_IO(
3989                                              struct ib_uverbs_create_srq,
3990                                              struct ib_uverbs_create_srq_resp),
3991                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
3992                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
3993                                      ib_uverbs_create_xsrq,
3994                                      UAPI_DEF_WRITE_UDATA_IO(
3995                                              struct ib_uverbs_create_xsrq,
3996                                              struct ib_uverbs_create_srq_resp),
3997                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
3998                 DECLARE_UVERBS_WRITE(
3999                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4000                         ib_uverbs_destroy_srq,
4001                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4002                                           struct ib_uverbs_destroy_srq_resp),
4003                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4004                 DECLARE_UVERBS_WRITE(
4005                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4006                         ib_uverbs_modify_srq,
4007                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4008                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4009                 DECLARE_UVERBS_WRITE(
4010                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4011                         ib_uverbs_post_srq_recv,
4012                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4013                                           struct ib_uverbs_post_srq_recv_resp),
4014                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4015                 DECLARE_UVERBS_WRITE(
4016                         IB_USER_VERBS_CMD_QUERY_SRQ,
4017                         ib_uverbs_query_srq,
4018                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4019                                           struct ib_uverbs_query_srq_resp),
4020                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4021
4022         DECLARE_UVERBS_OBJECT(
4023                 UVERBS_OBJECT_XRCD,
4024                 DECLARE_UVERBS_WRITE(
4025                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4026                         ib_uverbs_close_xrcd,
4027                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4028                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4029                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4030                                      ib_uverbs_open_qp,
4031                                      UAPI_DEF_WRITE_UDATA_IO(
4032                                              struct ib_uverbs_open_qp,
4033                                              struct ib_uverbs_create_qp_resp)),
4034                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4035                                      ib_uverbs_open_xrcd,
4036                                      UAPI_DEF_WRITE_UDATA_IO(
4037                                              struct ib_uverbs_open_xrcd,
4038                                              struct ib_uverbs_open_xrcd_resp),
4039                                      UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4040
4041         {},
4042 };