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