drivers/infiniband/core/uverbs_cmd.c

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