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->res.type = RDMA_RESTRACK_CTX;
 222         ucontext->device = ib_dev;
 223         ucontext->ufile = ufile;
 224         xa_init_flags(&ucontext->mmap_xa, XA_FLAGS_ALLOC);
 225         attrs->context = ucontext;
 226         return 0;
 227 }
 228
 229 int ib_init_ucontext(struct uverbs_attr_bundle *attrs)
 230 {
 231         struct ib_ucontext *ucontext = attrs->context;
 232         struct ib_uverbs_file *file = attrs->ufile;
 233         int ret;
 234
 235         if (!down_read_trylock(&file->hw_destroy_rwsem))
 236                 return -EIO;
 237         mutex_lock(&file->ucontext_lock);
 238         if (file->ucontext) {
 239                 ret = -EINVAL;
 240                 goto err;
 241         }
 242
 243         ret = ib_rdmacg_try_charge(&ucontext->cg_obj, ucontext->device,
 244                                    RDMACG_RESOURCE_HCA_HANDLE);
 245         if (ret)
 246                 goto err;
 247
 248         ret = ucontext->device->ops.alloc_ucontext(ucontext,
 249                                                    &attrs->driver_udata);
 250         if (ret)
 251                 goto err_uncharge;
 252
 253         rdma_restrack_uadd(&ucontext->res);
 254
 255         /*
 256          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 257          * only after all writes to setup the ucontext have completed
 258          */
 259         smp_store_release(&file->ucontext, ucontext);
 260
 261         mutex_unlock(&file->ucontext_lock);
 262         up_read(&file->hw_destroy_rwsem);
 263         return 0;
 264
 265 err_uncharge:
 266         ib_rdmacg_uncharge(&ucontext->cg_obj, ucontext->device,
 267                            RDMACG_RESOURCE_HCA_HANDLE);
 268 err:
 269         mutex_unlock(&file->ucontext_lock);
 270         up_read(&file->hw_destroy_rwsem);
 271         return ret;
 272 }
 273
 274 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 275 {
 276         struct ib_uverbs_get_context_resp resp;
 277         struct ib_uverbs_get_context cmd;
 278         struct ib_device *ib_dev;
 279         struct ib_uobject *uobj;
 280         int ret;
 281
 282         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 283         if (ret)
 284                 return ret;
 285
 286         ret = ib_alloc_ucontext(attrs);
 287         if (ret)
 288                 return ret;
 289
 290         uobj = uobj_alloc(UVERBS_OBJECT_ASYNC_EVENT, attrs, &ib_dev);
 291         if (IS_ERR(uobj)) {
 292                 ret = PTR_ERR(uobj);
 293                 goto err_ucontext;
 294         }
 295
 296         resp = (struct ib_uverbs_get_context_resp){
 297                 .num_comp_vectors = attrs->ufile->device->num_comp_vectors,
 298                 .async_fd = uobj->id,
 299         };
 300         ret = uverbs_response(attrs, &resp, sizeof(resp));
 301         if (ret)
 302                 goto err_uobj;
 303
 304         ret = ib_init_ucontext(attrs);
 305         if (ret)
 306                 goto err_uobj;
 307
 308         ib_uverbs_init_async_event_file(
 309                 container_of(uobj, struct ib_uverbs_async_event_file, uobj));
 310         rdma_alloc_commit_uobject(uobj, attrs);
 311         return 0;
 312
 313 err_uobj:
 314         rdma_alloc_abort_uobject(uobj, attrs);
 315 err_ucontext:
 316         kfree(attrs->context);
 317         attrs->context = NULL;
 318         return ret;
 319 }
 320
 321 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 322                                   struct ib_uverbs_query_device_resp *resp,
 323                                   struct ib_device_attr *attr)
 324 {
 325         struct ib_device *ib_dev = ucontext->device;
 326
 327         resp->fw_ver            = attr->fw_ver;
 328         resp->node_guid         = ib_dev->node_guid;
 329         resp->sys_image_guid    = attr->sys_image_guid;
 330         resp->max_mr_size       = attr->max_mr_size;
 331         resp->page_size_cap     = attr->page_size_cap;
 332         resp->vendor_id         = attr->vendor_id;
 333         resp->vendor_part_id    = attr->vendor_part_id;
 334         resp->hw_ver            = attr->hw_ver;
 335         resp->max_qp            = attr->max_qp;
 336         resp->max_qp_wr         = attr->max_qp_wr;
 337         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 338         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 339         resp->max_sge_rd        = attr->max_sge_rd;
 340         resp->max_cq            = attr->max_cq;
 341         resp->max_cqe           = attr->max_cqe;
 342         resp->max_mr            = attr->max_mr;
 343         resp->max_pd            = attr->max_pd;
 344         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 345         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 346         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 347         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 348         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 349         resp->atomic_cap                = attr->atomic_cap;
 350         resp->max_ee                    = attr->max_ee;
 351         resp->max_rdd                   = attr->max_rdd;
 352         resp->max_mw                    = attr->max_mw;
 353         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 354         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 355         resp->max_mcast_grp             = attr->max_mcast_grp;
 356         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 357         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 358         resp->max_ah                    = attr->max_ah;
 359         resp->max_fmr                   = attr->max_fmr;
 360         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 361         resp->max_srq                   = attr->max_srq;
 362         resp->max_srq_wr                = attr->max_srq_wr;
 363         resp->max_srq_sge               = attr->max_srq_sge;
 364         resp->max_pkeys                 = attr->max_pkeys;
 365         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 366         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 367 }
 368
 369 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 370 {
 371         struct ib_uverbs_query_device      cmd;
 372         struct ib_uverbs_query_device_resp resp;
 373         struct ib_ucontext *ucontext;
 374         int ret;
 375
 376         ucontext = ib_uverbs_get_ucontext(attrs);
 377         if (IS_ERR(ucontext))
 378                 return PTR_ERR(ucontext);
 379
 380         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 381         if (ret)
 382                 return ret;
 383
 384         memset(&resp, 0, sizeof resp);
 385         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 386
 387         return uverbs_response(attrs, &resp, sizeof(resp));
 388 }
 389
 390 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 391 {
 392         struct ib_uverbs_query_port      cmd;
 393         struct ib_uverbs_query_port_resp resp;
 394         struct ib_port_attr              attr;
 395         int                              ret;
 396         struct ib_ucontext *ucontext;
 397         struct ib_device *ib_dev;
 398
 399         ucontext = ib_uverbs_get_ucontext(attrs);
 400         if (IS_ERR(ucontext))
 401                 return PTR_ERR(ucontext);
 402         ib_dev = ucontext->device;
 403
 404         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 405         if (ret)
 406                 return ret;
 407
 408         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 409         if (ret)
 410                 return ret;
 411
 412         memset(&resp, 0, sizeof resp);
 413         copy_port_attr_to_resp(&attr, &resp, ib_dev, cmd.port_num);
 414
 415         return uverbs_response(attrs, &resp, sizeof(resp));
 416 }
 417
 418 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 419 {
 420         struct ib_uverbs_alloc_pd      cmd;
 421         struct ib_uverbs_alloc_pd_resp resp;
 422         struct ib_uobject             *uobj;
 423         struct ib_pd                  *pd;
 424         int                            ret;
 425         struct ib_device *ib_dev;
 426
 427         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 428         if (ret)
 429                 return ret;
 430
 431         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 432         if (IS_ERR(uobj))
 433                 return PTR_ERR(uobj);
 434
 435         pd = rdma_zalloc_drv_obj(ib_dev, ib_pd);
 436         if (!pd) {
 437                 ret = -ENOMEM;
 438                 goto err;
 439         }
 440
 441         pd->device  = ib_dev;
 442         pd->uobject = uobj;
 443         pd->__internal_mr = NULL;
 444         atomic_set(&pd->usecnt, 0);
 445         pd->res.type = RDMA_RESTRACK_PD;
 446
 447         ret = ib_dev->ops.alloc_pd(pd, &attrs->driver_udata);
 448         if (ret)
 449                 goto err_alloc;
 450
 451         uobj->object = pd;
 452         memset(&resp, 0, sizeof resp);
 453         resp.pd_handle = uobj->id;
 454         rdma_restrack_uadd(&pd->res);
 455
 456         ret = uverbs_response(attrs, &resp, sizeof(resp));
 457         if (ret)
 458                 goto err_copy;
 459
 460         rdma_alloc_commit_uobject(uobj, attrs);
 461         return 0;
 462
 463 err_copy:
 464         ib_dealloc_pd_user(pd, uverbs_get_cleared_udata(attrs));
 465         pd = NULL;
 466 err_alloc:
 467         kfree(pd);
 468 err:
 469         uobj_alloc_abort(uobj, attrs);
 470         return ret;
 471 }
 472
 473 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 474 {
 475         struct ib_uverbs_dealloc_pd cmd;
 476         int ret;
 477
 478         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 479         if (ret)
 480                 return ret;
 481
 482         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 483 }
 484
 485 struct xrcd_table_entry {
 486         struct rb_node  node;
 487         struct ib_xrcd *xrcd;
 488         struct inode   *inode;
 489 };
 490
 491 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 492                             struct inode *inode,
 493                             struct ib_xrcd *xrcd)
 494 {
 495         struct xrcd_table_entry *entry, *scan;
 496         struct rb_node **p = &dev->xrcd_tree.rb_node;
 497         struct rb_node *parent = NULL;
 498
 499         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 500         if (!entry)
 501                 return -ENOMEM;
 502
 503         entry->xrcd  = xrcd;
 504         entry->inode = inode;
 505
 506         while (*p) {
 507                 parent = *p;
 508                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 509
 510                 if (inode < scan->inode) {
 511                         p = &(*p)->rb_left;
 512                 } else if (inode > scan->inode) {
 513                         p = &(*p)->rb_right;
 514                 } else {
 515                         kfree(entry);
 516                         return -EEXIST;
 517                 }
 518         }
 519
 520         rb_link_node(&entry->node, parent, p);
 521         rb_insert_color(&entry->node, &dev->xrcd_tree);
 522         igrab(inode);
 523         return 0;
 524 }
 525
 526 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 527                                                   struct inode *inode)
 528 {
 529         struct xrcd_table_entry *entry;
 530         struct rb_node *p = dev->xrcd_tree.rb_node;
 531
 532         while (p) {
 533                 entry = rb_entry(p, struct xrcd_table_entry, node);
 534
 535                 if (inode < entry->inode)
 536                         p = p->rb_left;
 537                 else if (inode > entry->inode)
 538                         p = p->rb_right;
 539                 else
 540                         return entry;
 541         }
 542
 543         return NULL;
 544 }
 545
 546 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 547 {
 548         struct xrcd_table_entry *entry;
 549
 550         entry = xrcd_table_search(dev, inode);
 551         if (!entry)
 552                 return NULL;
 553
 554         return entry->xrcd;
 555 }
 556
 557 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 558                               struct inode *inode)
 559 {
 560         struct xrcd_table_entry *entry;
 561
 562         entry = xrcd_table_search(dev, inode);
 563         if (entry) {
 564                 iput(inode);
 565                 rb_erase(&entry->node, &dev->xrcd_tree);
 566                 kfree(entry);
 567         }
 568 }
 569
 570 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 571 {
 572         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 573         struct ib_uverbs_open_xrcd      cmd;
 574         struct ib_uverbs_open_xrcd_resp resp;
 575         struct ib_uxrcd_object         *obj;
 576         struct ib_xrcd                 *xrcd = NULL;
 577         struct fd                       f = {NULL, 0};
 578         struct inode                   *inode = NULL;
 579         int                             ret = 0;
 580         int                             new_xrcd = 0;
 581         struct ib_device *ib_dev;
 582
 583         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 584         if (ret)
 585                 return ret;
 586
 587         mutex_lock(&ibudev->xrcd_tree_mutex);
 588
 589         if (cmd.fd != -1) {
 590                 /* search for file descriptor */
 591                 f = fdget(cmd.fd);
 592                 if (!f.file) {
 593                         ret = -EBADF;
 594                         goto err_tree_mutex_unlock;
 595                 }
 596
 597                 inode = file_inode(f.file);
 598                 xrcd = find_xrcd(ibudev, inode);
 599                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 600                         /* no file descriptor. Need CREATE flag */
 601                         ret = -EAGAIN;
 602                         goto err_tree_mutex_unlock;
 603                 }
 604
 605                 if (xrcd && cmd.oflags & O_EXCL) {
 606                         ret = -EINVAL;
 607                         goto err_tree_mutex_unlock;
 608                 }
 609         }
 610
 611         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 612                                                    &ib_dev);
 613         if (IS_ERR(obj)) {
 614                 ret = PTR_ERR(obj);
 615                 goto err_tree_mutex_unlock;
 616         }
 617
 618         if (!xrcd) {
 619                 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, &attrs->driver_udata);
 620                 if (IS_ERR(xrcd)) {
 621                         ret = PTR_ERR(xrcd);
 622                         goto err;
 623                 }
 624
 625                 xrcd->inode   = inode;
 626                 xrcd->device  = ib_dev;
 627                 atomic_set(&xrcd->usecnt, 0);
 628                 mutex_init(&xrcd->tgt_qp_mutex);
 629                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 630                 new_xrcd = 1;
 631         }
 632
 633         atomic_set(&obj->refcnt, 0);
 634         obj->uobject.object = xrcd;
 635         memset(&resp, 0, sizeof resp);
 636         resp.xrcd_handle = obj->uobject.id;
 637
 638         if (inode) {
 639                 if (new_xrcd) {
 640                         /* create new inode/xrcd table entry */
 641                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 642                         if (ret)
 643                                 goto err_dealloc_xrcd;
 644                 }
 645                 atomic_inc(&xrcd->usecnt);
 646         }
 647
 648         ret = uverbs_response(attrs, &resp, sizeof(resp));
 649         if (ret)
 650                 goto err_copy;
 651
 652         if (f.file)
 653                 fdput(f);
 654
 655         mutex_unlock(&ibudev->xrcd_tree_mutex);
 656
 657         rdma_alloc_commit_uobject(&obj->uobject, attrs);
 658         return 0;
 659
 660 err_copy:
 661         if (inode) {
 662                 if (new_xrcd)
 663                         xrcd_table_delete(ibudev, inode);
 664                 atomic_dec(&xrcd->usecnt);
 665         }
 666
 667 err_dealloc_xrcd:
 668         ib_dealloc_xrcd(xrcd, uverbs_get_cleared_udata(attrs));
 669
 670 err:
 671         uobj_alloc_abort(&obj->uobject, attrs);
 672
 673 err_tree_mutex_unlock:
 674         if (f.file)
 675                 fdput(f);
 676
 677         mutex_unlock(&ibudev->xrcd_tree_mutex);
 678
 679         return ret;
 680 }
 681
 682 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 683 {
 684         struct ib_uverbs_close_xrcd cmd;
 685         int ret;
 686
 687         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 688         if (ret)
 689                 return ret;
 690
 691         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 692 }
 693
 694 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject, struct ib_xrcd *xrcd,
 695                            enum rdma_remove_reason why,
 696                            struct uverbs_attr_bundle *attrs)
 697 {
 698         struct inode *inode;
 699         int ret;
 700         struct ib_uverbs_device *dev = attrs->ufile->device;
 701
 702         inode = xrcd->inode;
 703         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 704                 return 0;
 705
 706         ret = ib_dealloc_xrcd(xrcd, &attrs->driver_udata);
 707
 708         if (ib_is_destroy_retryable(ret, why, uobject)) {
 709                 atomic_inc(&xrcd->usecnt);
 710                 return ret;
 711         }
 712
 713         if (inode)
 714                 xrcd_table_delete(dev, inode);
 715
 716         return ret;
 717 }
 718
 719 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 720 {
 721         struct ib_uverbs_reg_mr      cmd;
 722         struct ib_uverbs_reg_mr_resp resp;
 723         struct ib_uobject           *uobj;
 724         struct ib_pd                *pd;
 725         struct ib_mr                *mr;
 726         int                          ret;
 727         struct ib_device *ib_dev;
 728
 729         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 730         if (ret)
 731                 return ret;
 732
 733         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 734                 return -EINVAL;
 735
 736         ret = ib_check_mr_access(cmd.access_flags);
 737         if (ret)
 738                 return ret;
 739
 740         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 741         if (IS_ERR(uobj))
 742                 return PTR_ERR(uobj);
 743
 744         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 745         if (!pd) {
 746                 ret = -EINVAL;
 747                 goto err_free;
 748         }
 749
 750         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 751                 if (!(pd->device->attrs.device_cap_flags &
 752                       IB_DEVICE_ON_DEMAND_PAGING)) {
 753                         pr_debug("ODP support not available\n");
 754                         ret = -EINVAL;
 755                         goto err_put;
 756                 }
 757         }
 758
 759         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 760                                          cmd.access_flags,
 761                                          &attrs->driver_udata);
 762         if (IS_ERR(mr)) {
 763                 ret = PTR_ERR(mr);
 764                 goto err_put;
 765         }
 766
 767         mr->device  = pd->device;
 768         mr->pd      = pd;
 769         mr->type    = IB_MR_TYPE_USER;
 770         mr->dm      = NULL;
 771         mr->sig_attrs = NULL;
 772         mr->uobject = uobj;
 773         atomic_inc(&pd->usecnt);
 774         mr->res.type = RDMA_RESTRACK_MR;
 775         rdma_restrack_uadd(&mr->res);
 776
 777         uobj->object = mr;
 778
 779         memset(&resp, 0, sizeof resp);
 780         resp.lkey      = mr->lkey;
 781         resp.rkey      = mr->rkey;
 782         resp.mr_handle = uobj->id;
 783
 784         ret = uverbs_response(attrs, &resp, sizeof(resp));
 785         if (ret)
 786                 goto err_copy;
 787
 788         uobj_put_obj_read(pd);
 789
 790         rdma_alloc_commit_uobject(uobj, attrs);
 791         return 0;
 792
 793 err_copy:
 794         ib_dereg_mr_user(mr, uverbs_get_cleared_udata(attrs));
 795
 796 err_put:
 797         uobj_put_obj_read(pd);
 798
 799 err_free:
 800         uobj_alloc_abort(uobj, attrs);
 801         return ret;
 802 }
 803
 804 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 805 {
 806         struct ib_uverbs_rereg_mr      cmd;
 807         struct ib_uverbs_rereg_mr_resp resp;
 808         struct ib_pd                *pd = NULL;
 809         struct ib_mr                *mr;
 810         struct ib_pd                *old_pd;
 811         int                          ret;
 812         struct ib_uobject           *uobj;
 813
 814         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 815         if (ret)
 816                 return ret;
 817
 818         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 819                 return -EINVAL;
 820
 821         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 822             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 823              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 824                         return -EINVAL;
 825
 826         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 827         if (IS_ERR(uobj))
 828                 return PTR_ERR(uobj);
 829
 830         mr = uobj->object;
 831
 832         if (mr->dm) {
 833                 ret = -EINVAL;
 834                 goto put_uobjs;
 835         }
 836
 837         if (cmd.flags & IB_MR_REREG_ACCESS) {
 838                 ret = ib_check_mr_access(cmd.access_flags);
 839                 if (ret)
 840                         goto put_uobjs;
 841         }
 842
 843         if (cmd.flags & IB_MR_REREG_PD) {
 844                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 845                                        attrs);
 846                 if (!pd) {
 847                         ret = -EINVAL;
 848                         goto put_uobjs;
 849                 }
 850         }
 851
 852         old_pd = mr->pd;
 853         ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
 854                                             cmd.length, cmd.hca_va,
 855                                             cmd.access_flags, pd,
 856                                             &attrs->driver_udata);
 857         if (ret)
 858                 goto put_uobj_pd;
 859
 860         if (cmd.flags & IB_MR_REREG_PD) {
 861                 atomic_inc(&pd->usecnt);
 862                 mr->pd = pd;
 863                 atomic_dec(&old_pd->usecnt);
 864         }
 865
 866         memset(&resp, 0, sizeof(resp));
 867         resp.lkey      = mr->lkey;
 868         resp.rkey      = mr->rkey;
 869
 870         ret = uverbs_response(attrs, &resp, sizeof(resp));
 871
 872 put_uobj_pd:
 873         if (cmd.flags & IB_MR_REREG_PD)
 874                 uobj_put_obj_read(pd);
 875
 876 put_uobjs:
 877         uobj_put_write(uobj);
 878
 879         return ret;
 880 }
 881
 882 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 883 {
 884         struct ib_uverbs_dereg_mr cmd;
 885         int ret;
 886
 887         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 888         if (ret)
 889                 return ret;
 890
 891         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 892 }
 893
 894 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 895 {
 896         struct ib_uverbs_alloc_mw      cmd;
 897         struct ib_uverbs_alloc_mw_resp resp;
 898         struct ib_uobject             *uobj;
 899         struct ib_pd                  *pd;
 900         struct ib_mw                  *mw;
 901         int                            ret;
 902         struct ib_device *ib_dev;
 903
 904         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 905         if (ret)
 906                 return ret;
 907
 908         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 909         if (IS_ERR(uobj))
 910                 return PTR_ERR(uobj);
 911
 912         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 913         if (!pd) {
 914                 ret = -EINVAL;
 915                 goto err_free;
 916         }
 917
 918         if (cmd.mw_type != IB_MW_TYPE_1 && cmd.mw_type != IB_MW_TYPE_2) {
 919                 ret = -EINVAL;
 920                 goto err_put;
 921         }
 922
 923         mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
 924         if (IS_ERR(mw)) {
 925                 ret = PTR_ERR(mw);
 926                 goto err_put;
 927         }
 928
 929         mw->device  = pd->device;
 930         mw->pd      = pd;
 931         mw->uobject = uobj;
 932         atomic_inc(&pd->usecnt);
 933
 934         uobj->object = mw;
 935
 936         memset(&resp, 0, sizeof(resp));
 937         resp.rkey      = mw->rkey;
 938         resp.mw_handle = uobj->id;
 939
 940         ret = uverbs_response(attrs, &resp, sizeof(resp));
 941         if (ret)
 942                 goto err_copy;
 943
 944         uobj_put_obj_read(pd);
 945         rdma_alloc_commit_uobject(uobj, attrs);
 946         return 0;
 947
 948 err_copy:
 949         uverbs_dealloc_mw(mw);
 950 err_put:
 951         uobj_put_obj_read(pd);
 952 err_free:
 953         uobj_alloc_abort(uobj, attrs);
 954         return ret;
 955 }
 956
 957 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 958 {
 959         struct ib_uverbs_dealloc_mw cmd;
 960         int ret;
 961
 962         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 963         if (ret)
 964                 return ret;
 965
 966         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 967 }
 968
 969 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 970 {
 971         struct ib_uverbs_create_comp_channel       cmd;
 972         struct ib_uverbs_create_comp_channel_resp  resp;
 973         struct ib_uobject                         *uobj;
 974         struct ib_uverbs_completion_event_file    *ev_file;
 975         struct ib_device *ib_dev;
 976         int ret;
 977
 978         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 979         if (ret)
 980                 return ret;
 981
 982         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 983         if (IS_ERR(uobj))
 984                 return PTR_ERR(uobj);
 985
 986         resp.fd = uobj->id;
 987
 988         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 989                                uobj);
 990         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 991
 992         ret = uverbs_response(attrs, &resp, sizeof(resp));
 993         if (ret) {
 994                 uobj_alloc_abort(uobj, attrs);
 995                 return ret;
 996         }
 997
 998         rdma_alloc_commit_uobject(uobj, attrs);
 999         return 0;
1000 }
1001
1002 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
1003                                        struct ib_uverbs_ex_create_cq *cmd)
1004 {
1005         struct ib_ucq_object           *obj;
1006         struct ib_uverbs_completion_event_file    *ev_file = NULL;
1007         struct ib_cq                   *cq;
1008         int                             ret;
1009         struct ib_uverbs_ex_create_cq_resp resp;
1010         struct ib_cq_init_attr attr = {};
1011         struct ib_device *ib_dev;
1012
1013         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1014                 return ERR_PTR(-EINVAL);
1015
1016         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1017                                                  &ib_dev);
1018         if (IS_ERR(obj))
1019                 return obj;
1020
1021         if (cmd->comp_channel >= 0) {
1022                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1023                 if (IS_ERR(ev_file)) {
1024                         ret = PTR_ERR(ev_file);
1025                         goto err;
1026                 }
1027         }
1028
1029         obj->uevent.uobject.user_handle = cmd->user_handle;
1030         INIT_LIST_HEAD(&obj->comp_list);
1031         INIT_LIST_HEAD(&obj->uevent.event_list);
1032
1033         attr.cqe = cmd->cqe;
1034         attr.comp_vector = cmd->comp_vector;
1035         attr.flags = cmd->flags;
1036
1037         cq = rdma_zalloc_drv_obj(ib_dev, ib_cq);
1038         if (!cq) {
1039                 ret = -ENOMEM;
1040                 goto err_file;
1041         }
1042         cq->device        = ib_dev;
1043         cq->uobject       = obj;
1044         cq->comp_handler  = ib_uverbs_comp_handler;
1045         cq->event_handler = ib_uverbs_cq_event_handler;
1046         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1047         atomic_set(&cq->usecnt, 0);
1048
1049         ret = ib_dev->ops.create_cq(cq, &attr, &attrs->driver_udata);
1050         if (ret)
1051                 goto err_free;
1052
1053         obj->uevent.uobject.object = cq;
1054         memset(&resp, 0, sizeof resp);
1055         resp.base.cq_handle = obj->uevent.uobject.id;
1056         resp.base.cqe       = cq->cqe;
1057         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1058
1059         cq->res.type = RDMA_RESTRACK_CQ;
1060         rdma_restrack_uadd(&cq->res);
1061
1062         ret = uverbs_response(attrs, &resp, sizeof(resp));
1063         if (ret)
1064                 goto err_cb;
1065
1066         rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1067         return obj;
1068
1069 err_cb:
1070         ib_destroy_cq_user(cq, uverbs_get_cleared_udata(attrs));
1071         cq = NULL;
1072 err_free:
1073         kfree(cq);
1074 err_file:
1075         if (ev_file)
1076                 ib_uverbs_release_ucq(ev_file, obj);
1077
1078 err:
1079         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1080
1081         return ERR_PTR(ret);
1082 }
1083
1084 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1085 {
1086         struct ib_uverbs_create_cq      cmd;
1087         struct ib_uverbs_ex_create_cq   cmd_ex;
1088         struct ib_ucq_object           *obj;
1089         int ret;
1090
1091         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1092         if (ret)
1093                 return ret;
1094
1095         memset(&cmd_ex, 0, sizeof(cmd_ex));
1096         cmd_ex.user_handle = cmd.user_handle;
1097         cmd_ex.cqe = cmd.cqe;
1098         cmd_ex.comp_vector = cmd.comp_vector;
1099         cmd_ex.comp_channel = cmd.comp_channel;
1100
1101         obj = create_cq(attrs, &cmd_ex);
1102         return PTR_ERR_OR_ZERO(obj);
1103 }
1104
1105 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1106 {
1107         struct ib_uverbs_ex_create_cq  cmd;
1108         struct ib_ucq_object           *obj;
1109         int ret;
1110
1111         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1112         if (ret)
1113                 return ret;
1114
1115         if (cmd.comp_mask)
1116                 return -EINVAL;
1117
1118         if (cmd.reserved)
1119                 return -EINVAL;
1120
1121         obj = create_cq(attrs, &cmd);
1122         return PTR_ERR_OR_ZERO(obj);
1123 }
1124
1125 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1126 {
1127         struct ib_uverbs_resize_cq      cmd;
1128         struct ib_uverbs_resize_cq_resp resp = {};
1129         struct ib_cq                    *cq;
1130         int                             ret = -EINVAL;
1131
1132         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1133         if (ret)
1134                 return ret;
1135
1136         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1137         if (!cq)
1138                 return -EINVAL;
1139
1140         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1141         if (ret)
1142                 goto out;
1143
1144         resp.cqe = cq->cqe;
1145
1146         ret = uverbs_response(attrs, &resp, sizeof(resp));
1147 out:
1148         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1149                                 UVERBS_LOOKUP_READ);
1150
1151         return ret;
1152 }
1153
1154 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1155                            struct ib_wc *wc)
1156 {
1157         struct ib_uverbs_wc tmp;
1158
1159         tmp.wr_id               = wc->wr_id;
1160         tmp.status              = wc->status;
1161         tmp.opcode              = wc->opcode;
1162         tmp.vendor_err          = wc->vendor_err;
1163         tmp.byte_len            = wc->byte_len;
1164         tmp.ex.imm_data         = wc->ex.imm_data;
1165         tmp.qp_num              = wc->qp->qp_num;
1166         tmp.src_qp              = wc->src_qp;
1167         tmp.wc_flags            = wc->wc_flags;
1168         tmp.pkey_index          = wc->pkey_index;
1169         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1170                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1171         else
1172                 tmp.slid        = ib_lid_cpu16(wc->slid);
1173         tmp.sl                  = wc->sl;
1174         tmp.dlid_path_bits      = wc->dlid_path_bits;
1175         tmp.port_num            = wc->port_num;
1176         tmp.reserved            = 0;
1177
1178         if (copy_to_user(dest, &tmp, sizeof tmp))
1179                 return -EFAULT;
1180
1181         return 0;
1182 }
1183
1184 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1185 {
1186         struct ib_uverbs_poll_cq       cmd;
1187         struct ib_uverbs_poll_cq_resp  resp;
1188         u8 __user                     *header_ptr;
1189         u8 __user                     *data_ptr;
1190         struct ib_cq                  *cq;
1191         struct ib_wc                   wc;
1192         int                            ret;
1193
1194         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1195         if (ret)
1196                 return ret;
1197
1198         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1199         if (!cq)
1200                 return -EINVAL;
1201
1202         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1203         header_ptr = attrs->ucore.outbuf;
1204         data_ptr = header_ptr + sizeof resp;
1205
1206         memset(&resp, 0, sizeof resp);
1207         while (resp.count < cmd.ne) {
1208                 ret = ib_poll_cq(cq, 1, &wc);
1209                 if (ret < 0)
1210                         goto out_put;
1211                 if (!ret)
1212                         break;
1213
1214                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1215                 if (ret)
1216                         goto out_put;
1217
1218                 data_ptr += sizeof(struct ib_uverbs_wc);
1219                 ++resp.count;
1220         }
1221
1222         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1223                 ret = -EFAULT;
1224                 goto out_put;
1225         }
1226         ret = 0;
1227
1228         if (uverbs_attr_is_valid(attrs, UVERBS_ATTR_CORE_OUT))
1229                 ret = uverbs_output_written(attrs, UVERBS_ATTR_CORE_OUT);
1230
1231 out_put:
1232         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1233                                 UVERBS_LOOKUP_READ);
1234         return ret;
1235 }
1236
1237 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1238 {
1239         struct ib_uverbs_req_notify_cq cmd;
1240         struct ib_cq                  *cq;
1241         int ret;
1242
1243         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1244         if (ret)
1245                 return ret;
1246
1247         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1248         if (!cq)
1249                 return -EINVAL;
1250
1251         ib_req_notify_cq(cq, cmd.solicited_only ?
1252                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1253
1254         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
1255                                 UVERBS_LOOKUP_READ);
1256         return 0;
1257 }
1258
1259 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1260 {
1261         struct ib_uverbs_destroy_cq      cmd;
1262         struct ib_uverbs_destroy_cq_resp resp;
1263         struct ib_uobject               *uobj;
1264         struct ib_ucq_object            *obj;
1265         int ret;
1266
1267         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1268         if (ret)
1269                 return ret;
1270
1271         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1272         if (IS_ERR(uobj))
1273                 return PTR_ERR(uobj);
1274
1275         obj = container_of(uobj, struct ib_ucq_object, uevent.uobject);
1276         memset(&resp, 0, sizeof(resp));
1277         resp.comp_events_reported  = obj->comp_events_reported;
1278         resp.async_events_reported = obj->uevent.events_reported;
1279
1280         uobj_put_destroy(uobj);
1281
1282         return uverbs_response(attrs, &resp, sizeof(resp));
1283 }
1284
1285 static int create_qp(struct uverbs_attr_bundle *attrs,
1286                      struct ib_uverbs_ex_create_qp *cmd)
1287 {
1288         struct ib_uqp_object            *obj;
1289         struct ib_device                *device;
1290         struct ib_pd                    *pd = NULL;
1291         struct ib_xrcd                  *xrcd = NULL;
1292         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1293         struct ib_cq                    *scq = NULL, *rcq = NULL;
1294         struct ib_srq                   *srq = NULL;
1295         struct ib_qp                    *qp;
1296         struct ib_qp_init_attr          attr = {};
1297         struct ib_uverbs_ex_create_qp_resp resp;
1298         int                             ret;
1299         struct ib_rwq_ind_table *ind_tbl = NULL;
1300         bool has_sq = true;
1301         struct ib_device *ib_dev;
1302
1303         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1304                 return -EPERM;
1305
1306         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1307                                                  &ib_dev);
1308         if (IS_ERR(obj))
1309                 return PTR_ERR(obj);
1310         obj->uxrcd = NULL;
1311         obj->uevent.uobject.user_handle = cmd->user_handle;
1312         mutex_init(&obj->mcast_lock);
1313
1314         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1315                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1316                                             UVERBS_OBJECT_RWQ_IND_TBL,
1317                                             cmd->rwq_ind_tbl_handle, attrs);
1318                 if (!ind_tbl) {
1319                         ret = -EINVAL;
1320                         goto err_put;
1321                 }
1322
1323                 attr.rwq_ind_tbl = ind_tbl;
1324         }
1325
1326         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1327                 ret = -EINVAL;
1328                 goto err_put;
1329         }
1330
1331         if (ind_tbl && !cmd->max_send_wr)
1332                 has_sq = false;
1333
1334         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1335                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1336                                           attrs);
1337
1338                 if (IS_ERR(xrcd_uobj)) {
1339                         ret = -EINVAL;
1340                         goto err_put;
1341                 }
1342
1343                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1344                 if (!xrcd) {
1345                         ret = -EINVAL;
1346                         goto err_put;
1347                 }
1348                 device = xrcd->device;
1349         } else {
1350                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1351                         cmd->max_recv_wr = 0;
1352                         cmd->max_recv_sge = 0;
1353                 } else {
1354                         if (cmd->is_srq) {
1355                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1356                                                         cmd->srq_handle, attrs);
1357                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1358                                         ret = -EINVAL;
1359                                         goto err_put;
1360                                 }
1361                         }
1362
1363                         if (!ind_tbl) {
1364                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1365                                         rcq = uobj_get_obj_read(
1366                                                 cq, UVERBS_OBJECT_CQ,
1367                                                 cmd->recv_cq_handle, attrs);
1368                                         if (!rcq) {
1369                                                 ret = -EINVAL;
1370                                                 goto err_put;
1371                                         }
1372                                 }
1373                         }
1374                 }
1375
1376                 if (has_sq)
1377                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1378                                                 cmd->send_cq_handle, attrs);
1379                 if (!ind_tbl)
1380                         rcq = rcq ?: scq;
1381                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1382                                        attrs);
1383                 if (!pd || (!scq && has_sq)) {
1384                         ret = -EINVAL;
1385                         goto err_put;
1386                 }
1387
1388                 device = pd->device;
1389         }
1390
1391         attr.event_handler = ib_uverbs_qp_event_handler;
1392         attr.send_cq       = scq;
1393         attr.recv_cq       = rcq;
1394         attr.srq           = srq;
1395         attr.xrcd          = xrcd;
1396         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1397                                               IB_SIGNAL_REQ_WR;
1398         attr.qp_type       = cmd->qp_type;
1399         attr.create_flags  = 0;
1400
1401         attr.cap.max_send_wr     = cmd->max_send_wr;
1402         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1403         attr.cap.max_send_sge    = cmd->max_send_sge;
1404         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1405         attr.cap.max_inline_data = cmd->max_inline_data;
1406
1407         INIT_LIST_HEAD(&obj->uevent.event_list);
1408         INIT_LIST_HEAD(&obj->mcast_list);
1409
1410         attr.create_flags = cmd->create_flags;
1411         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1412                                 IB_QP_CREATE_CROSS_CHANNEL |
1413                                 IB_QP_CREATE_MANAGED_SEND |
1414                                 IB_QP_CREATE_MANAGED_RECV |
1415                                 IB_QP_CREATE_SCATTER_FCS |
1416                                 IB_QP_CREATE_CVLAN_STRIPPING |
1417                                 IB_QP_CREATE_SOURCE_QPN |
1418                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1419                 ret = -EINVAL;
1420                 goto err_put;
1421         }
1422
1423         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1424                 if (!capable(CAP_NET_RAW)) {
1425                         ret = -EPERM;
1426                         goto err_put;
1427                 }
1428
1429                 attr.source_qpn = cmd->source_qpn;
1430         }
1431
1432         if (cmd->qp_type == IB_QPT_XRC_TGT)
1433                 qp = ib_create_qp(pd, &attr);
1434         else
1435                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1436                                    obj);
1437
1438         if (IS_ERR(qp)) {
1439                 ret = PTR_ERR(qp);
1440                 goto err_put;
1441         }
1442
1443         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1444                 ret = ib_create_qp_security(qp, device);
1445                 if (ret)
1446                         goto err_cb;
1447
1448                 qp->pd            = pd;
1449                 qp->send_cq       = attr.send_cq;
1450                 qp->recv_cq       = attr.recv_cq;
1451                 qp->srq           = attr.srq;
1452                 qp->rwq_ind_tbl   = ind_tbl;
1453                 qp->event_handler = attr.event_handler;
1454                 qp->qp_type       = attr.qp_type;
1455                 atomic_set(&qp->usecnt, 0);
1456                 atomic_inc(&pd->usecnt);
1457                 qp->port = 0;
1458                 if (attr.send_cq)
1459                         atomic_inc(&attr.send_cq->usecnt);
1460                 if (attr.recv_cq)
1461                         atomic_inc(&attr.recv_cq->usecnt);
1462                 if (attr.srq)
1463                         atomic_inc(&attr.srq->usecnt);
1464                 if (ind_tbl)
1465                         atomic_inc(&ind_tbl->usecnt);
1466         } else {
1467                 /* It is done in _ib_create_qp for other QP types */
1468                 qp->uobject = obj;
1469         }
1470
1471         obj->uevent.uobject.object = qp;
1472
1473         memset(&resp, 0, sizeof resp);
1474         resp.base.qpn             = qp->qp_num;
1475         resp.base.qp_handle       = obj->uevent.uobject.id;
1476         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1477         resp.base.max_send_sge    = attr.cap.max_send_sge;
1478         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1479         resp.base.max_send_wr     = attr.cap.max_send_wr;
1480         resp.base.max_inline_data = attr.cap.max_inline_data;
1481         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1482
1483         ret = uverbs_response(attrs, &resp, sizeof(resp));
1484         if (ret)
1485                 goto err_cb;
1486
1487         if (xrcd) {
1488                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1489                                           uobject);
1490                 atomic_inc(&obj->uxrcd->refcnt);
1491                 uobj_put_read(xrcd_uobj);
1492         }
1493
1494         if (pd)
1495                 uobj_put_obj_read(pd);
1496         if (scq)
1497                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1498                                         UVERBS_LOOKUP_READ);
1499         if (rcq && rcq != scq)
1500                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1501                                         UVERBS_LOOKUP_READ);
1502         if (srq)
1503                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1504                                         UVERBS_LOOKUP_READ);
1505         if (ind_tbl)
1506                 uobj_put_obj_read(ind_tbl);
1507
1508         rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1509         return 0;
1510 err_cb:
1511         ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1512
1513 err_put:
1514         if (!IS_ERR(xrcd_uobj))
1515                 uobj_put_read(xrcd_uobj);
1516         if (pd)
1517                 uobj_put_obj_read(pd);
1518         if (scq)
1519                 rdma_lookup_put_uobject(&scq->uobject->uevent.uobject,
1520                                         UVERBS_LOOKUP_READ);
1521         if (rcq && rcq != scq)
1522                 rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject,
1523                                         UVERBS_LOOKUP_READ);
1524         if (srq)
1525                 rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
1526                                         UVERBS_LOOKUP_READ);
1527         if (ind_tbl)
1528                 uobj_put_obj_read(ind_tbl);
1529
1530         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1531         return ret;
1532 }
1533
1534 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1535 {
1536         struct ib_uverbs_create_qp      cmd;
1537         struct ib_uverbs_ex_create_qp   cmd_ex;
1538         int ret;
1539
1540         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1541         if (ret)
1542                 return ret;
1543
1544         memset(&cmd_ex, 0, sizeof(cmd_ex));
1545         cmd_ex.user_handle = cmd.user_handle;
1546         cmd_ex.pd_handle = cmd.pd_handle;
1547         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1548         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1549         cmd_ex.srq_handle = cmd.srq_handle;
1550         cmd_ex.max_send_wr = cmd.max_send_wr;
1551         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1552         cmd_ex.max_send_sge = cmd.max_send_sge;
1553         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1554         cmd_ex.max_inline_data = cmd.max_inline_data;
1555         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1556         cmd_ex.qp_type = cmd.qp_type;
1557         cmd_ex.is_srq = cmd.is_srq;
1558
1559         return create_qp(attrs, &cmd_ex);
1560 }
1561
1562 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1563 {
1564         struct ib_uverbs_ex_create_qp cmd;
1565         int ret;
1566
1567         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1568         if (ret)
1569                 return ret;
1570
1571         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1572                 return -EINVAL;
1573
1574         if (cmd.reserved)
1575                 return -EINVAL;
1576
1577         return create_qp(attrs, &cmd);
1578 }
1579
1580 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1581 {
1582         struct ib_uverbs_open_qp        cmd;
1583         struct ib_uverbs_create_qp_resp resp;
1584         struct ib_uqp_object           *obj;
1585         struct ib_xrcd                 *xrcd;
1586         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1587         struct ib_qp                   *qp;
1588         struct ib_qp_open_attr          attr = {};
1589         int ret;
1590         struct ib_device *ib_dev;
1591
1592         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1593         if (ret)
1594                 return ret;
1595
1596         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1597                                                  &ib_dev);
1598         if (IS_ERR(obj))
1599                 return PTR_ERR(obj);
1600
1601         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1602         if (IS_ERR(xrcd_uobj)) {
1603                 ret = -EINVAL;
1604                 goto err_put;
1605         }
1606
1607         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1608         if (!xrcd) {
1609                 ret = -EINVAL;
1610                 goto err_xrcd;
1611         }
1612
1613         attr.event_handler = ib_uverbs_qp_event_handler;
1614         attr.qp_num        = cmd.qpn;
1615         attr.qp_type       = cmd.qp_type;
1616
1617         INIT_LIST_HEAD(&obj->uevent.event_list);
1618         INIT_LIST_HEAD(&obj->mcast_list);
1619
1620         qp = ib_open_qp(xrcd, &attr);
1621         if (IS_ERR(qp)) {
1622                 ret = PTR_ERR(qp);
1623                 goto err_xrcd;
1624         }
1625
1626         obj->uevent.uobject.object = qp;
1627         obj->uevent.uobject.user_handle = cmd.user_handle;
1628
1629         memset(&resp, 0, sizeof resp);
1630         resp.qpn       = qp->qp_num;
1631         resp.qp_handle = obj->uevent.uobject.id;
1632
1633         ret = uverbs_response(attrs, &resp, sizeof(resp));
1634         if (ret)
1635                 goto err_destroy;
1636
1637         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1638         atomic_inc(&obj->uxrcd->refcnt);
1639         qp->uobject = obj;
1640         uobj_put_read(xrcd_uobj);
1641
1642         rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
1643         return 0;
1644
1645 err_destroy:
1646         ib_destroy_qp_user(qp, uverbs_get_cleared_udata(attrs));
1647 err_xrcd:
1648         uobj_put_read(xrcd_uobj);
1649 err_put:
1650         uobj_alloc_abort(&obj->uevent.uobject, attrs);
1651         return ret;
1652 }
1653
1654 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1655                                    struct rdma_ah_attr *rdma_attr)
1656 {
1657         const struct ib_global_route   *grh;
1658
1659         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1660         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1661         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1662         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1663         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1664                                          IB_AH_GRH);
1665         if (uverb_attr->is_global) {
1666                 grh = rdma_ah_read_grh(rdma_attr);
1667                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1668                 uverb_attr->flow_label        = grh->flow_label;
1669                 uverb_attr->sgid_index        = grh->sgid_index;
1670                 uverb_attr->hop_limit         = grh->hop_limit;
1671                 uverb_attr->traffic_class     = grh->traffic_class;
1672         }
1673         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1674 }
1675
1676 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1677 {
1678         struct ib_uverbs_query_qp      cmd;
1679         struct ib_uverbs_query_qp_resp resp;
1680         struct ib_qp                   *qp;
1681         struct ib_qp_attr              *attr;
1682         struct ib_qp_init_attr         *init_attr;
1683         int                            ret;
1684
1685         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1686         if (ret)
1687                 return ret;
1688
1689         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1690         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1691         if (!attr || !init_attr) {
1692                 ret = -ENOMEM;
1693                 goto out;
1694         }
1695
1696         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1697         if (!qp) {
1698                 ret = -EINVAL;
1699                 goto out;
1700         }
1701
1702         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1703
1704         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1705                                 UVERBS_LOOKUP_READ);
1706
1707         if (ret)
1708                 goto out;
1709
1710         memset(&resp, 0, sizeof resp);
1711
1712         resp.qp_state               = attr->qp_state;
1713         resp.cur_qp_state           = attr->cur_qp_state;
1714         resp.path_mtu               = attr->path_mtu;
1715         resp.path_mig_state         = attr->path_mig_state;
1716         resp.qkey                   = attr->qkey;
1717         resp.rq_psn                 = attr->rq_psn;
1718         resp.sq_psn                 = attr->sq_psn;
1719         resp.dest_qp_num            = attr->dest_qp_num;
1720         resp.qp_access_flags        = attr->qp_access_flags;
1721         resp.pkey_index             = attr->pkey_index;
1722         resp.alt_pkey_index         = attr->alt_pkey_index;
1723         resp.sq_draining            = attr->sq_draining;
1724         resp.max_rd_atomic          = attr->max_rd_atomic;
1725         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1726         resp.min_rnr_timer          = attr->min_rnr_timer;
1727         resp.port_num               = attr->port_num;
1728         resp.timeout                = attr->timeout;
1729         resp.retry_cnt              = attr->retry_cnt;
1730         resp.rnr_retry              = attr->rnr_retry;
1731         resp.alt_port_num           = attr->alt_port_num;
1732         resp.alt_timeout            = attr->alt_timeout;
1733
1734         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1735         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1736
1737         resp.max_send_wr            = init_attr->cap.max_send_wr;
1738         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1739         resp.max_send_sge           = init_attr->cap.max_send_sge;
1740         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1741         resp.max_inline_data        = init_attr->cap.max_inline_data;
1742         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1743
1744         ret = uverbs_response(attrs, &resp, sizeof(resp));
1745
1746 out:
1747         kfree(attr);
1748         kfree(init_attr);
1749
1750         return ret;
1751 }
1752
1753 /* Remove ignored fields set in the attribute mask */
1754 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1755 {
1756         switch (qp_type) {
1757         case IB_QPT_XRC_INI:
1758                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1759         case IB_QPT_XRC_TGT:
1760                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1761                                 IB_QP_RNR_RETRY);
1762         default:
1763                 return mask;
1764         }
1765 }
1766
1767 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1768                                      struct rdma_ah_attr *rdma_attr,
1769                                      struct ib_uverbs_qp_dest *uverb_attr)
1770 {
1771         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1772         if (uverb_attr->is_global) {
1773                 rdma_ah_set_grh(rdma_attr, NULL,
1774                                 uverb_attr->flow_label,
1775                                 uverb_attr->sgid_index,
1776                                 uverb_attr->hop_limit,
1777                                 uverb_attr->traffic_class);
1778                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1779         } else {
1780                 rdma_ah_set_ah_flags(rdma_attr, 0);
1781         }
1782         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1783         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1784         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1785         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1786         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1787         rdma_ah_set_make_grd(rdma_attr, false);
1788 }
1789
1790 static int modify_qp(struct uverbs_attr_bundle *attrs,
1791                      struct ib_uverbs_ex_modify_qp *cmd)
1792 {
1793         struct ib_qp_attr *attr;
1794         struct ib_qp *qp;
1795         int ret;
1796
1797         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1798         if (!attr)
1799                 return -ENOMEM;
1800
1801         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1802                                attrs);
1803         if (!qp) {
1804                 ret = -EINVAL;
1805                 goto out;
1806         }
1807
1808         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1809             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1810                 ret = -EINVAL;
1811                 goto release_qp;
1812         }
1813
1814         if ((cmd->base.attr_mask & IB_QP_AV)) {
1815                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1816                         ret = -EINVAL;
1817                         goto release_qp;
1818                 }
1819
1820                 if (cmd->base.attr_mask & IB_QP_STATE &&
1821                     cmd->base.qp_state == IB_QPS_RTR) {
1822                 /* We are in INIT->RTR TRANSITION (if we are not,
1823                  * this transition will be rejected in subsequent checks).
1824                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1825                  * but the IB_QP_STATE flag is required.
1826                  *
1827                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1828                  * when IB_QP_AV is set, has required inclusion of a valid
1829                  * port number in the primary AV. (AVs are created and handled
1830                  * differently for infiniband and ethernet (RoCE) ports).
1831                  *
1832                  * Check the port number included in the primary AV against
1833                  * the port number in the qp struct, which was set (and saved)
1834                  * in the RST->INIT transition.
1835                  */
1836                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1837                                 ret = -EINVAL;
1838                                 goto release_qp;
1839                         }
1840                 } else {
1841                 /* We are in SQD->SQD. (If we are not, this transition will
1842                  * be rejected later in the verbs layer checks).
1843                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1844                  * together in the SQD->SQD transition.
1845                  *
1846                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1847                  * verbs layer driver does not track primary port changes
1848                  * resulting from path migration. Thus, in SQD, if the primary
1849                  * AV is modified, the primary port should also be modified).
1850                  *
1851                  * Note that in this transition, the IB_QP_STATE flag
1852                  * is not allowed.
1853                  */
1854                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1855                              == (IB_QP_AV | IB_QP_PORT)) &&
1856                             cmd->base.port_num != cmd->base.dest.port_num) {
1857                                 ret = -EINVAL;
1858                                 goto release_qp;
1859                         }
1860                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1861                             == IB_QP_AV) {
1862                                 cmd->base.attr_mask |= IB_QP_PORT;
1863                                 cmd->base.port_num = cmd->base.dest.port_num;
1864                         }
1865                 }
1866         }
1867
1868         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1869             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1870             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1871             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1872                 ret = -EINVAL;
1873                 goto release_qp;
1874         }
1875
1876         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1877             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1878             (cmd->base.attr_mask & IB_QP_STATE &&
1879             cmd->base.qp_state > IB_QPS_ERR)) {
1880                 ret = -EINVAL;
1881                 goto release_qp;
1882         }
1883
1884         if (cmd->base.attr_mask & IB_QP_STATE)
1885                 attr->qp_state = cmd->base.qp_state;
1886         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1887                 attr->cur_qp_state = cmd->base.cur_qp_state;
1888         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1889                 attr->path_mtu = cmd->base.path_mtu;
1890         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1891                 attr->path_mig_state = cmd->base.path_mig_state;
1892         if (cmd->base.attr_mask & IB_QP_QKEY)
1893                 attr->qkey = cmd->base.qkey;
1894         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1895                 attr->rq_psn = cmd->base.rq_psn;
1896         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1897                 attr->sq_psn = cmd->base.sq_psn;
1898         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1899                 attr->dest_qp_num = cmd->base.dest_qp_num;
1900         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1901                 attr->qp_access_flags = cmd->base.qp_access_flags;
1902         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1903                 attr->pkey_index = cmd->base.pkey_index;
1904         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1905                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1906         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1907                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1908         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1909                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1910         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1911                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1912         if (cmd->base.attr_mask & IB_QP_PORT)
1913                 attr->port_num = cmd->base.port_num;
1914         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1915                 attr->timeout = cmd->base.timeout;
1916         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1917                 attr->retry_cnt = cmd->base.retry_cnt;
1918         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1919                 attr->rnr_retry = cmd->base.rnr_retry;
1920         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1921                 attr->alt_port_num = cmd->base.alt_port_num;
1922                 attr->alt_timeout = cmd->base.alt_timeout;
1923                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1924         }
1925         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1926                 attr->rate_limit = cmd->rate_limit;
1927
1928         if (cmd->base.attr_mask & IB_QP_AV)
1929                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1930                                          &cmd->base.dest);
1931
1932         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1933                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1934                                          &cmd->base.alt_dest);
1935
1936         ret = ib_modify_qp_with_udata(qp, attr,
1937                                       modify_qp_mask(qp->qp_type,
1938                                                      cmd->base.attr_mask),
1939                                       &attrs->driver_udata);
1940
1941 release_qp:
1942         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
1943                                 UVERBS_LOOKUP_READ);
1944 out:
1945         kfree(attr);
1946
1947         return ret;
1948 }
1949
1950 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1951 {
1952         struct ib_uverbs_ex_modify_qp cmd;
1953         int ret;
1954
1955         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1956         if (ret)
1957                 return ret;
1958
1959         if (cmd.base.attr_mask &
1960             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1961                 return -EOPNOTSUPP;
1962
1963         return modify_qp(attrs, &cmd);
1964 }
1965
1966 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1967 {
1968         struct ib_uverbs_ex_modify_qp cmd;
1969         struct ib_uverbs_ex_modify_qp_resp resp = {
1970                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1971         };
1972         int ret;
1973
1974         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1975         if (ret)
1976                 return ret;
1977
1978         /*
1979          * Last bit is reserved for extending the attr_mask by
1980          * using another field.
1981          */
1982         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
1983
1984         if (cmd.base.attr_mask &
1985             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
1986                 return -EOPNOTSUPP;
1987
1988         ret = modify_qp(attrs, &cmd);
1989         if (ret)
1990                 return ret;
1991
1992         return uverbs_response(attrs, &resp, sizeof(resp));
1993 }
1994
1995 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1996 {
1997         struct ib_uverbs_destroy_qp      cmd;
1998         struct ib_uverbs_destroy_qp_resp resp;
1999         struct ib_uobject               *uobj;
2000         struct ib_uqp_object            *obj;
2001         int ret;
2002
2003         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2004         if (ret)
2005                 return ret;
2006
2007         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2008         if (IS_ERR(uobj))
2009                 return PTR_ERR(uobj);
2010
2011         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2012         memset(&resp, 0, sizeof(resp));
2013         resp.events_reported = obj->uevent.events_reported;
2014
2015         uobj_put_destroy(uobj);
2016
2017         return uverbs_response(attrs, &resp, sizeof(resp));
2018 }
2019
2020 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2021 {
2022         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2023                        sizeof (struct ib_sge))
2024                 return NULL;
2025
2026         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2027                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2028 }
2029
2030 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2031 {
2032         struct ib_uverbs_post_send      cmd;
2033         struct ib_uverbs_post_send_resp resp;
2034         struct ib_uverbs_send_wr       *user_wr;
2035         struct ib_send_wr              *wr = NULL, *last, *next;
2036         const struct ib_send_wr        *bad_wr;
2037         struct ib_qp                   *qp;
2038         int                             i, sg_ind;
2039         int                             is_ud;
2040         int ret, ret2;
2041         size_t                          next_size;
2042         const struct ib_sge __user *sgls;
2043         const void __user *wqes;
2044         struct uverbs_req_iter iter;
2045
2046         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2047         if (ret)
2048                 return ret;
2049         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2050         if (IS_ERR(wqes))
2051                 return PTR_ERR(wqes);
2052         sgls = uverbs_request_next_ptr(
2053                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2054         if (IS_ERR(sgls))
2055                 return PTR_ERR(sgls);
2056         ret = uverbs_request_finish(&iter);
2057         if (ret)
2058                 return ret;
2059
2060         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2061         if (!user_wr)
2062                 return -ENOMEM;
2063
2064         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2065         if (!qp) {
2066                 ret = -EINVAL;
2067                 goto out;
2068         }
2069
2070         is_ud = qp->qp_type == IB_QPT_UD;
2071         sg_ind = 0;
2072         last = NULL;
2073         for (i = 0; i < cmd.wr_count; ++i) {
2074                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2075                                    cmd.wqe_size)) {
2076                         ret = -EFAULT;
2077                         goto out_put;
2078                 }
2079
2080                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2081                         ret = -EINVAL;
2082                         goto out_put;
2083                 }
2084
2085                 if (is_ud) {
2086                         struct ib_ud_wr *ud;
2087
2088                         if (user_wr->opcode != IB_WR_SEND &&
2089                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2090                                 ret = -EINVAL;
2091                                 goto out_put;
2092                         }
2093
2094                         next_size = sizeof(*ud);
2095                         ud = alloc_wr(next_size, user_wr->num_sge);
2096                         if (!ud) {
2097                                 ret = -ENOMEM;
2098                                 goto out_put;
2099                         }
2100
2101                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2102                                                    user_wr->wr.ud.ah, attrs);
2103                         if (!ud->ah) {
2104                                 kfree(ud);
2105                                 ret = -EINVAL;
2106                                 goto out_put;
2107                         }
2108                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2109                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2110
2111                         next = &ud->wr;
2112                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2113                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2114                            user_wr->opcode == IB_WR_RDMA_READ) {
2115                         struct ib_rdma_wr *rdma;
2116
2117                         next_size = sizeof(*rdma);
2118                         rdma = alloc_wr(next_size, user_wr->num_sge);
2119                         if (!rdma) {
2120                                 ret = -ENOMEM;
2121                                 goto out_put;
2122                         }
2123
2124                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2125                         rdma->rkey = user_wr->wr.rdma.rkey;
2126
2127                         next = &rdma->wr;
2128                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2129                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2130                         struct ib_atomic_wr *atomic;
2131
2132                         next_size = sizeof(*atomic);
2133                         atomic = alloc_wr(next_size, user_wr->num_sge);
2134                         if (!atomic) {
2135                                 ret = -ENOMEM;
2136                                 goto out_put;
2137                         }
2138
2139                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2140                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2141                         atomic->swap = user_wr->wr.atomic.swap;
2142                         atomic->rkey = user_wr->wr.atomic.rkey;
2143
2144                         next = &atomic->wr;
2145                 } else if (user_wr->opcode == IB_WR_SEND ||
2146                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2147                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2148                         next_size = sizeof(*next);
2149                         next = alloc_wr(next_size, user_wr->num_sge);
2150                         if (!next) {
2151                                 ret = -ENOMEM;
2152                                 goto out_put;
2153                         }
2154                 } else {
2155                         ret = -EINVAL;
2156                         goto out_put;
2157                 }
2158
2159                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2160                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2161                         next->ex.imm_data =
2162                                         (__be32 __force) user_wr->ex.imm_data;
2163                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2164                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2165                 }
2166
2167                 if (!last)
2168                         wr = next;
2169                 else
2170                         last->next = next;
2171                 last = next;
2172
2173                 next->next       = NULL;
2174                 next->wr_id      = user_wr->wr_id;
2175                 next->num_sge    = user_wr->num_sge;
2176                 next->opcode     = user_wr->opcode;
2177                 next->send_flags = user_wr->send_flags;
2178
2179                 if (next->num_sge) {
2180                         next->sg_list = (void *) next +
2181                                 ALIGN(next_size, sizeof(struct ib_sge));
2182                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2183                                            next->num_sge *
2184                                                    sizeof(struct ib_sge))) {
2185                                 ret = -EFAULT;
2186                                 goto out_put;
2187                         }
2188                         sg_ind += next->num_sge;
2189                 } else
2190                         next->sg_list = NULL;
2191         }
2192
2193         resp.bad_wr = 0;
2194         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2195         if (ret)
2196                 for (next = wr; next; next = next->next) {
2197                         ++resp.bad_wr;
2198                         if (next == bad_wr)
2199                                 break;
2200                 }
2201
2202         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2203         if (ret2)
2204                 ret = ret2;
2205
2206 out_put:
2207         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2208                                 UVERBS_LOOKUP_READ);
2209
2210         while (wr) {
2211                 if (is_ud && ud_wr(wr)->ah)
2212                         uobj_put_obj_read(ud_wr(wr)->ah);
2213                 next = wr->next;
2214                 kfree(wr);
2215                 wr = next;
2216         }
2217
2218 out:
2219         kfree(user_wr);
2220
2221         return ret;
2222 }
2223
2224 static struct ib_recv_wr *
2225 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2226                           u32 wqe_size, u32 sge_count)
2227 {
2228         struct ib_uverbs_recv_wr *user_wr;
2229         struct ib_recv_wr        *wr = NULL, *last, *next;
2230         int                       sg_ind;
2231         int                       i;
2232         int                       ret;
2233         const struct ib_sge __user *sgls;
2234         const void __user *wqes;
2235
2236         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2237                 return ERR_PTR(-EINVAL);
2238
2239         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2240         if (IS_ERR(wqes))
2241                 return ERR_CAST(wqes);
2242         sgls = uverbs_request_next_ptr(
2243                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2244         if (IS_ERR(sgls))
2245                 return ERR_CAST(sgls);
2246         ret = uverbs_request_finish(iter);
2247         if (ret)
2248                 return ERR_PTR(ret);
2249
2250         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2251         if (!user_wr)
2252                 return ERR_PTR(-ENOMEM);
2253
2254         sg_ind = 0;
2255         last = NULL;
2256         for (i = 0; i < wr_count; ++i) {
2257                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2258                                    wqe_size)) {
2259                         ret = -EFAULT;
2260                         goto err;
2261                 }
2262
2263                 if (user_wr->num_sge + sg_ind > sge_count) {
2264                         ret = -EINVAL;
2265                         goto err;
2266                 }
2267
2268                 if (user_wr->num_sge >=
2269                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2270                     sizeof (struct ib_sge)) {
2271                         ret = -EINVAL;
2272                         goto err;
2273                 }
2274
2275                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2276                                user_wr->num_sge * sizeof (struct ib_sge),
2277                                GFP_KERNEL);
2278                 if (!next) {
2279                         ret = -ENOMEM;
2280                         goto err;
2281                 }
2282
2283                 if (!last)
2284                         wr = next;
2285                 else
2286                         last->next = next;
2287                 last = next;
2288
2289                 next->next       = NULL;
2290                 next->wr_id      = user_wr->wr_id;
2291                 next->num_sge    = user_wr->num_sge;
2292
2293                 if (next->num_sge) {
2294                         next->sg_list = (void *) next +
2295                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2296                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2297                                            next->num_sge *
2298                                                    sizeof(struct ib_sge))) {
2299                                 ret = -EFAULT;
2300                                 goto err;
2301                         }
2302                         sg_ind += next->num_sge;
2303                 } else
2304                         next->sg_list = NULL;
2305         }
2306
2307         kfree(user_wr);
2308         return wr;
2309
2310 err:
2311         kfree(user_wr);
2312
2313         while (wr) {
2314                 next = wr->next;
2315                 kfree(wr);
2316                 wr = next;
2317         }
2318
2319         return ERR_PTR(ret);
2320 }
2321
2322 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2323 {
2324         struct ib_uverbs_post_recv      cmd;
2325         struct ib_uverbs_post_recv_resp resp;
2326         struct ib_recv_wr              *wr, *next;
2327         const struct ib_recv_wr        *bad_wr;
2328         struct ib_qp                   *qp;
2329         int ret, ret2;
2330         struct uverbs_req_iter iter;
2331
2332         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2333         if (ret)
2334                 return ret;
2335
2336         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2337                                        cmd.sge_count);
2338         if (IS_ERR(wr))
2339                 return PTR_ERR(wr);
2340
2341         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2342         if (!qp) {
2343                 ret = -EINVAL;
2344                 goto out;
2345         }
2346
2347         resp.bad_wr = 0;
2348         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2349
2350         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2351                                 UVERBS_LOOKUP_READ);
2352         if (ret) {
2353                 for (next = wr; next; next = next->next) {
2354                         ++resp.bad_wr;
2355                         if (next == bad_wr)
2356                                 break;
2357                 }
2358         }
2359
2360         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2361         if (ret2)
2362                 ret = ret2;
2363 out:
2364         while (wr) {
2365                 next = wr->next;
2366                 kfree(wr);
2367                 wr = next;
2368         }
2369
2370         return ret;
2371 }
2372
2373 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2374 {
2375         struct ib_uverbs_post_srq_recv      cmd;
2376         struct ib_uverbs_post_srq_recv_resp resp;
2377         struct ib_recv_wr                  *wr, *next;
2378         const struct ib_recv_wr            *bad_wr;
2379         struct ib_srq                      *srq;
2380         int ret, ret2;
2381         struct uverbs_req_iter iter;
2382
2383         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2384         if (ret)
2385                 return ret;
2386
2387         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2388                                        cmd.sge_count);
2389         if (IS_ERR(wr))
2390                 return PTR_ERR(wr);
2391
2392         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2393         if (!srq) {
2394                 ret = -EINVAL;
2395                 goto out;
2396         }
2397
2398         resp.bad_wr = 0;
2399         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2400
2401         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
2402                                 UVERBS_LOOKUP_READ);
2403
2404         if (ret)
2405                 for (next = wr; next; next = next->next) {
2406                         ++resp.bad_wr;
2407                         if (next == bad_wr)
2408                                 break;
2409                 }
2410
2411         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2412         if (ret2)
2413                 ret = ret2;
2414
2415 out:
2416         while (wr) {
2417                 next = wr->next;
2418                 kfree(wr);
2419                 wr = next;
2420         }
2421
2422         return ret;
2423 }
2424
2425 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2426 {
2427         struct ib_uverbs_create_ah       cmd;
2428         struct ib_uverbs_create_ah_resp  resp;
2429         struct ib_uobject               *uobj;
2430         struct ib_pd                    *pd;
2431         struct ib_ah                    *ah;
2432         struct rdma_ah_attr             attr = {};
2433         int ret;
2434         struct ib_device *ib_dev;
2435
2436         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2437         if (ret)
2438                 return ret;
2439
2440         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2441         if (IS_ERR(uobj))
2442                 return PTR_ERR(uobj);
2443
2444         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2445                 ret = -EINVAL;
2446                 goto err;
2447         }
2448
2449         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2450         if (!pd) {
2451                 ret = -EINVAL;
2452                 goto err;
2453         }
2454
2455         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2456         rdma_ah_set_make_grd(&attr, false);
2457         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2458         rdma_ah_set_sl(&attr, cmd.attr.sl);
2459         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2460         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2461         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2462
2463         if (cmd.attr.is_global) {
2464                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2465                                 cmd.attr.grh.sgid_index,
2466                                 cmd.attr.grh.hop_limit,
2467                                 cmd.attr.grh.traffic_class);
2468                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2469         } else {
2470                 rdma_ah_set_ah_flags(&attr, 0);
2471         }
2472
2473         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2474         if (IS_ERR(ah)) {
2475                 ret = PTR_ERR(ah);
2476                 goto err_put;
2477         }
2478
2479         ah->uobject  = uobj;
2480         uobj->user_handle = cmd.user_handle;
2481         uobj->object = ah;
2482
2483         resp.ah_handle = uobj->id;
2484
2485         ret = uverbs_response(attrs, &resp, sizeof(resp));
2486         if (ret)
2487                 goto err_copy;
2488
2489         uobj_put_obj_read(pd);
2490         rdma_alloc_commit_uobject(uobj, attrs);
2491         return 0;
2492
2493 err_copy:
2494         rdma_destroy_ah_user(ah, RDMA_DESTROY_AH_SLEEPABLE,
2495                              uverbs_get_cleared_udata(attrs));
2496
2497 err_put:
2498         uobj_put_obj_read(pd);
2499
2500 err:
2501         uobj_alloc_abort(uobj, attrs);
2502         return ret;
2503 }
2504
2505 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2506 {
2507         struct ib_uverbs_destroy_ah cmd;
2508         int ret;
2509
2510         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2511         if (ret)
2512                 return ret;
2513
2514         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2515 }
2516
2517 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2518 {
2519         struct ib_uverbs_attach_mcast cmd;
2520         struct ib_qp                 *qp;
2521         struct ib_uqp_object         *obj;
2522         struct ib_uverbs_mcast_entry *mcast;
2523         int                           ret;
2524
2525         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2526         if (ret)
2527                 return ret;
2528
2529         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2530         if (!qp)
2531                 return -EINVAL;
2532
2533         obj = qp->uobject;
2534
2535         mutex_lock(&obj->mcast_lock);
2536         list_for_each_entry(mcast, &obj->mcast_list, list)
2537                 if (cmd.mlid == mcast->lid &&
2538                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2539                         ret = 0;
2540                         goto out_put;
2541                 }
2542
2543         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2544         if (!mcast) {
2545                 ret = -ENOMEM;
2546                 goto out_put;
2547         }
2548
2549         mcast->lid = cmd.mlid;
2550         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2551
2552         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2553         if (!ret)
2554                 list_add_tail(&mcast->list, &obj->mcast_list);
2555         else
2556                 kfree(mcast);
2557
2558 out_put:
2559         mutex_unlock(&obj->mcast_lock);
2560         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2561                                 UVERBS_LOOKUP_READ);
2562
2563         return ret;
2564 }
2565
2566 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2567 {
2568         struct ib_uverbs_detach_mcast cmd;
2569         struct ib_uqp_object         *obj;
2570         struct ib_qp                 *qp;
2571         struct ib_uverbs_mcast_entry *mcast;
2572         int                           ret;
2573         bool                          found = false;
2574
2575         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2576         if (ret)
2577                 return ret;
2578
2579         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2580         if (!qp)
2581                 return -EINVAL;
2582
2583         obj = qp->uobject;
2584         mutex_lock(&obj->mcast_lock);
2585
2586         list_for_each_entry(mcast, &obj->mcast_list, list)
2587                 if (cmd.mlid == mcast->lid &&
2588                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2589                         list_del(&mcast->list);
2590                         kfree(mcast);
2591                         found = true;
2592                         break;
2593                 }
2594
2595         if (!found) {
2596                 ret = -EINVAL;
2597                 goto out_put;
2598         }
2599
2600         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2601
2602 out_put:
2603         mutex_unlock(&obj->mcast_lock);
2604         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
2605                                 UVERBS_LOOKUP_READ);
2606         return ret;
2607 }
2608
2609 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2610 {
2611         struct ib_uflow_resources *resources;
2612
2613         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2614
2615         if (!resources)
2616                 return NULL;
2617
2618         if (!num_specs)
2619                 goto out;
2620
2621         resources->counters =
2622                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2623         resources->collection =
2624                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2625
2626         if (!resources->counters || !resources->collection)
2627                 goto err;
2628
2629 out:
2630         resources->max = num_specs;
2631         return resources;
2632
2633 err:
2634         kfree(resources->counters);
2635         kfree(resources);
2636
2637         return NULL;
2638 }
2639 EXPORT_SYMBOL(flow_resources_alloc);
2640
2641 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2642 {
2643         unsigned int i;
2644
2645         if (!uflow_res)
2646                 return;
2647
2648         for (i = 0; i < uflow_res->collection_num; i++)
2649                 atomic_dec(&uflow_res->collection[i]->usecnt);
2650
2651         for (i = 0; i < uflow_res->counters_num; i++)
2652                 atomic_dec(&uflow_res->counters[i]->usecnt);
2653
2654         kfree(uflow_res->collection);
2655         kfree(uflow_res->counters);
2656         kfree(uflow_res);
2657 }
2658 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2659
2660 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2661                         enum ib_flow_spec_type type,
2662                         void *ibobj)
2663 {
2664         WARN_ON(uflow_res->num >= uflow_res->max);
2665
2666         switch (type) {
2667         case IB_FLOW_SPEC_ACTION_HANDLE:
2668                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2669                 uflow_res->collection[uflow_res->collection_num++] =
2670                         (struct ib_flow_action *)ibobj;
2671                 break;
2672         case IB_FLOW_SPEC_ACTION_COUNT:
2673                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2674                 uflow_res->counters[uflow_res->counters_num++] =
2675                         (struct ib_counters *)ibobj;
2676                 break;
2677         default:
2678                 WARN_ON(1);
2679         }
2680
2681         uflow_res->num++;
2682 }
2683 EXPORT_SYMBOL(flow_resources_add);
2684
2685 static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs,
2686                                        struct ib_uverbs_flow_spec *kern_spec,
2687                                        union ib_flow_spec *ib_spec,
2688                                        struct ib_uflow_resources *uflow_res)
2689 {
2690         ib_spec->type = kern_spec->type;
2691         switch (ib_spec->type) {
2692         case IB_FLOW_SPEC_ACTION_TAG:
2693                 if (kern_spec->flow_tag.size !=
2694                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2695                         return -EINVAL;
2696
2697                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2698                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2699                 break;
2700         case IB_FLOW_SPEC_ACTION_DROP:
2701                 if (kern_spec->drop.size !=
2702                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2703                         return -EINVAL;
2704
2705                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2706                 break;
2707         case IB_FLOW_SPEC_ACTION_HANDLE:
2708                 if (kern_spec->action.size !=
2709                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2710                         return -EOPNOTSUPP;
2711                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2712                                                         UVERBS_OBJECT_FLOW_ACTION,
2713                                                         kern_spec->action.handle,
2714                                                         attrs);
2715                 if (!ib_spec->action.act)
2716                         return -EINVAL;
2717                 ib_spec->action.size =
2718                         sizeof(struct ib_flow_spec_action_handle);
2719                 flow_resources_add(uflow_res,
2720                                    IB_FLOW_SPEC_ACTION_HANDLE,
2721                                    ib_spec->action.act);
2722                 uobj_put_obj_read(ib_spec->action.act);
2723                 break;
2724         case IB_FLOW_SPEC_ACTION_COUNT:
2725                 if (kern_spec->flow_count.size !=
2726                         sizeof(struct ib_uverbs_flow_spec_action_count))
2727                         return -EINVAL;
2728                 ib_spec->flow_count.counters =
2729                         uobj_get_obj_read(counters,
2730                                           UVERBS_OBJECT_COUNTERS,
2731                                           kern_spec->flow_count.handle,
2732                                           attrs);
2733                 if (!ib_spec->flow_count.counters)
2734                         return -EINVAL;
2735                 ib_spec->flow_count.size =
2736                                 sizeof(struct ib_flow_spec_action_count);
2737                 flow_resources_add(uflow_res,
2738                                    IB_FLOW_SPEC_ACTION_COUNT,
2739                                    ib_spec->flow_count.counters);
2740                 uobj_put_obj_read(ib_spec->flow_count.counters);
2741                 break;
2742         default:
2743                 return -EINVAL;
2744         }
2745         return 0;
2746 }
2747
2748 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2749 {
2750         /* Returns user space filter size, includes padding */
2751         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2752 }
2753
2754 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2755                                 u16 ib_real_filter_sz)
2756 {
2757         /*
2758          * User space filter structures must be 64 bit aligned, otherwise this
2759          * may pass, but we won't handle additional new attributes.
2760          */
2761
2762         if (kern_filter_size > ib_real_filter_sz) {
2763                 if (memchr_inv(kern_spec_filter +
2764                                ib_real_filter_sz, 0,
2765                                kern_filter_size - ib_real_filter_sz))
2766                         return -EINVAL;
2767                 return ib_real_filter_sz;
2768         }
2769         return kern_filter_size;
2770 }
2771
2772 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2773                                           const void *kern_spec_mask,
2774                                           const void *kern_spec_val,
2775                                           size_t kern_filter_sz,
2776                                           union ib_flow_spec *ib_spec)
2777 {
2778         ssize_t actual_filter_sz;
2779         ssize_t ib_filter_sz;
2780
2781         /* User flow spec size must be aligned to 4 bytes */
2782         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2783                 return -EINVAL;
2784
2785         ib_spec->type = type;
2786
2787         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2788                 return -EINVAL;
2789
2790         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2791         case IB_FLOW_SPEC_ETH:
2792                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2793                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2794                                                     kern_filter_sz,
2795                                                     ib_filter_sz);
2796                 if (actual_filter_sz <= 0)
2797                         return -EINVAL;
2798                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2799                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2800                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2801                 break;
2802         case IB_FLOW_SPEC_IPV4:
2803                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2804                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2805                                                     kern_filter_sz,
2806                                                     ib_filter_sz);
2807                 if (actual_filter_sz <= 0)
2808                         return -EINVAL;
2809                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2810                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2811                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2812                 break;
2813         case IB_FLOW_SPEC_IPV6:
2814                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2815                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2816                                                     kern_filter_sz,
2817                                                     ib_filter_sz);
2818                 if (actual_filter_sz <= 0)
2819                         return -EINVAL;
2820                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2821                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2822                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2823
2824                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2825                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2826                         return -EINVAL;
2827                 break;
2828         case IB_FLOW_SPEC_TCP:
2829         case IB_FLOW_SPEC_UDP:
2830                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2831                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2832                                                     kern_filter_sz,
2833                                                     ib_filter_sz);
2834                 if (actual_filter_sz <= 0)
2835                         return -EINVAL;
2836                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2837                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2838                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2839                 break;
2840         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2841                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2842                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2843                                                     kern_filter_sz,
2844                                                     ib_filter_sz);
2845                 if (actual_filter_sz <= 0)
2846                         return -EINVAL;
2847                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2848                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2849                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2850
2851                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2852                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2853                         return -EINVAL;
2854                 break;
2855         case IB_FLOW_SPEC_ESP:
2856                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2857                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2858                                                     kern_filter_sz,
2859                                                     ib_filter_sz);
2860                 if (actual_filter_sz <= 0)
2861                         return -EINVAL;
2862                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2863                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2864                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2865                 break;
2866         case IB_FLOW_SPEC_GRE:
2867                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2868                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2869                                                     kern_filter_sz,
2870                                                     ib_filter_sz);
2871                 if (actual_filter_sz <= 0)
2872                         return -EINVAL;
2873                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2874                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2875                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2876                 break;
2877         case IB_FLOW_SPEC_MPLS:
2878                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2879                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2880                                                     kern_filter_sz,
2881                                                     ib_filter_sz);
2882                 if (actual_filter_sz <= 0)
2883                         return -EINVAL;
2884                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2885                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2886                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2887                 break;
2888         default:
2889                 return -EINVAL;
2890         }
2891         return 0;
2892 }
2893
2894 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2895                                        union ib_flow_spec *ib_spec)
2896 {
2897         ssize_t kern_filter_sz;
2898         void *kern_spec_mask;
2899         void *kern_spec_val;
2900
2901         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2902
2903         kern_spec_val = (void *)kern_spec +
2904                 sizeof(struct ib_uverbs_flow_spec_hdr);
2905         kern_spec_mask = kern_spec_val + kern_filter_sz;
2906
2907         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2908                                                      kern_spec_mask,
2909                                                      kern_spec_val,
2910                                                      kern_filter_sz, ib_spec);
2911 }
2912
2913 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2914                                 struct ib_uverbs_flow_spec *kern_spec,
2915                                 union ib_flow_spec *ib_spec,
2916                                 struct ib_uflow_resources *uflow_res)
2917 {
2918         if (kern_spec->reserved)
2919                 return -EINVAL;
2920
2921         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2922                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2923                                                    uflow_res);
2924         else
2925                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2926 }
2927
2928 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2929 {
2930         struct ib_uverbs_ex_create_wq cmd;
2931         struct ib_uverbs_ex_create_wq_resp resp = {};
2932         struct ib_uwq_object           *obj;
2933         int err = 0;
2934         struct ib_cq *cq;
2935         struct ib_pd *pd;
2936         struct ib_wq *wq;
2937         struct ib_wq_init_attr wq_init_attr = {};
2938         struct ib_device *ib_dev;
2939
2940         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2941         if (err)
2942                 return err;
2943
2944         if (cmd.comp_mask)
2945                 return -EOPNOTSUPP;
2946
2947         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2948                                                  &ib_dev);
2949         if (IS_ERR(obj))
2950                 return PTR_ERR(obj);
2951
2952         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2953         if (!pd) {
2954                 err = -EINVAL;
2955                 goto err_uobj;
2956         }
2957
2958         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2959         if (!cq) {
2960                 err = -EINVAL;
2961                 goto err_put_pd;
2962         }
2963
2964         wq_init_attr.cq = cq;
2965         wq_init_attr.max_sge = cmd.max_sge;
2966         wq_init_attr.max_wr = cmd.max_wr;
2967         wq_init_attr.wq_context = attrs->ufile;
2968         wq_init_attr.wq_type = cmd.wq_type;
2969         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2970         wq_init_attr.create_flags = cmd.create_flags;
2971         INIT_LIST_HEAD(&obj->uevent.event_list);
2972
2973         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2974         if (IS_ERR(wq)) {
2975                 err = PTR_ERR(wq);
2976                 goto err_put_cq;
2977         }
2978
2979         wq->uobject = obj;
2980         obj->uevent.uobject.object = wq;
2981         wq->wq_type = wq_init_attr.wq_type;
2982         wq->cq = cq;
2983         wq->pd = pd;
2984         wq->device = pd->device;
2985         wq->wq_context = wq_init_attr.wq_context;
2986         atomic_set(&wq->usecnt, 0);
2987         atomic_inc(&pd->usecnt);
2988         atomic_inc(&cq->usecnt);
2989         wq->uobject = obj;
2990         obj->uevent.uobject.object = wq;
2991
2992         memset(&resp, 0, sizeof(resp));
2993         resp.wq_handle = obj->uevent.uobject.id;
2994         resp.max_sge = wq_init_attr.max_sge;
2995         resp.max_wr = wq_init_attr.max_wr;
2996         resp.wqn = wq->wq_num;
2997         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2998         err = uverbs_response(attrs, &resp, sizeof(resp));
2999         if (err)
3000                 goto err_copy;
3001
3002         uobj_put_obj_read(pd);
3003         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3004                                 UVERBS_LOOKUP_READ);
3005         rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
3006         return 0;
3007
3008 err_copy:
3009         ib_destroy_wq(wq, uverbs_get_cleared_udata(attrs));
3010 err_put_cq:
3011         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3012                                 UVERBS_LOOKUP_READ);
3013 err_put_pd:
3014         uobj_put_obj_read(pd);
3015 err_uobj:
3016         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3017
3018         return err;
3019 }
3020
3021 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
3022 {
3023         struct ib_uverbs_ex_destroy_wq  cmd;
3024         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3025         struct ib_uobject               *uobj;
3026         struct ib_uwq_object            *obj;
3027         int                             ret;
3028
3029         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3030         if (ret)
3031                 return ret;
3032
3033         if (cmd.comp_mask)
3034                 return -EOPNOTSUPP;
3035
3036         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3037         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3038         if (IS_ERR(uobj))
3039                 return PTR_ERR(uobj);
3040
3041         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3042         resp.events_reported = obj->uevent.events_reported;
3043
3044         uobj_put_destroy(uobj);
3045
3046         return uverbs_response(attrs, &resp, sizeof(resp));
3047 }
3048
3049 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3050 {
3051         struct ib_uverbs_ex_modify_wq cmd;
3052         struct ib_wq *wq;
3053         struct ib_wq_attr wq_attr = {};
3054         int ret;
3055
3056         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3057         if (ret)
3058                 return ret;
3059
3060         if (!cmd.attr_mask)
3061                 return -EINVAL;
3062
3063         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3064                 return -EINVAL;
3065
3066         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3067         if (!wq)
3068                 return -EINVAL;
3069
3070         wq_attr.curr_wq_state = cmd.curr_wq_state;
3071         wq_attr.wq_state = cmd.wq_state;
3072         if (cmd.attr_mask & IB_WQ_FLAGS) {
3073                 wq_attr.flags = cmd.flags;
3074                 wq_attr.flags_mask = cmd.flags_mask;
3075         }
3076         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3077                                         &attrs->driver_udata);
3078         rdma_lookup_put_uobject(&wq->uobject->uevent.uobject,
3079                                 UVERBS_LOOKUP_READ);
3080         return ret;
3081 }
3082
3083 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3084 {
3085         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3086         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3087         struct ib_uobject                 *uobj;
3088         int err;
3089         struct ib_rwq_ind_table_init_attr init_attr = {};
3090         struct ib_rwq_ind_table *rwq_ind_tbl;
3091         struct ib_wq    **wqs = NULL;
3092         u32 *wqs_handles = NULL;
3093         struct ib_wq    *wq = NULL;
3094         int i, j, num_read_wqs;
3095         u32 num_wq_handles;
3096         struct uverbs_req_iter iter;
3097         struct ib_device *ib_dev;
3098
3099         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3100         if (err)
3101                 return err;
3102
3103         if (cmd.comp_mask)
3104                 return -EOPNOTSUPP;
3105
3106         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3107                 return -EINVAL;
3108
3109         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3110         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3111                               GFP_KERNEL);
3112         if (!wqs_handles)
3113                 return -ENOMEM;
3114
3115         err = uverbs_request_next(&iter, wqs_handles,
3116                                   num_wq_handles * sizeof(__u32));
3117         if (err)
3118                 goto err_free;
3119
3120         err = uverbs_request_finish(&iter);
3121         if (err)
3122                 goto err_free;
3123
3124         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3125         if (!wqs) {
3126                 err = -ENOMEM;
3127                 goto  err_free;
3128         }
3129
3130         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3131                         num_read_wqs++) {
3132                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3133                                        wqs_handles[num_read_wqs], attrs);
3134                 if (!wq) {
3135                         err = -EINVAL;
3136                         goto put_wqs;
3137                 }
3138
3139                 wqs[num_read_wqs] = wq;
3140         }
3141
3142         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3143         if (IS_ERR(uobj)) {
3144                 err = PTR_ERR(uobj);
3145                 goto put_wqs;
3146         }
3147
3148         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3149         init_attr.ind_tbl = wqs;
3150
3151         rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr,
3152                                                        &attrs->driver_udata);
3153
3154         if (IS_ERR(rwq_ind_tbl)) {
3155                 err = PTR_ERR(rwq_ind_tbl);
3156                 goto err_uobj;
3157         }
3158
3159         rwq_ind_tbl->ind_tbl = wqs;
3160         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3161         rwq_ind_tbl->uobject = uobj;
3162         uobj->object = rwq_ind_tbl;
3163         rwq_ind_tbl->device = ib_dev;
3164         atomic_set(&rwq_ind_tbl->usecnt, 0);
3165
3166         for (i = 0; i < num_wq_handles; i++)
3167                 atomic_inc(&wqs[i]->usecnt);
3168
3169         resp.ind_tbl_handle = uobj->id;
3170         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3171         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3172
3173         err = uverbs_response(attrs, &resp, sizeof(resp));
3174         if (err)
3175                 goto err_copy;
3176
3177         kfree(wqs_handles);
3178
3179         for (j = 0; j < num_read_wqs; j++)
3180                 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject,
3181                                         UVERBS_LOOKUP_READ);
3182
3183         rdma_alloc_commit_uobject(uobj, attrs);
3184         return 0;
3185
3186 err_copy:
3187         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3188 err_uobj:
3189         uobj_alloc_abort(uobj, attrs);
3190 put_wqs:
3191         for (j = 0; j < num_read_wqs; j++)
3192                 rdma_lookup_put_uobject(&wqs[j]->uobject->uevent.uobject,
3193                                         UVERBS_LOOKUP_READ);
3194 err_free:
3195         kfree(wqs_handles);
3196         kfree(wqs);
3197         return err;
3198 }
3199
3200 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3201 {
3202         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3203         int ret;
3204
3205         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3206         if (ret)
3207                 return ret;
3208
3209         if (cmd.comp_mask)
3210                 return -EOPNOTSUPP;
3211
3212         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3213                                     cmd.ind_tbl_handle, attrs);
3214 }
3215
3216 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3217 {
3218         struct ib_uverbs_create_flow      cmd;
3219         struct ib_uverbs_create_flow_resp resp;
3220         struct ib_uobject                 *uobj;
3221         struct ib_flow                    *flow_id;
3222         struct ib_uverbs_flow_attr        *kern_flow_attr;
3223         struct ib_flow_attr               *flow_attr;
3224         struct ib_qp                      *qp;
3225         struct ib_uflow_resources         *uflow_res;
3226         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3227         struct uverbs_req_iter iter;
3228         int err;
3229         void *ib_spec;
3230         int i;
3231         struct ib_device *ib_dev;
3232
3233         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3234         if (err)
3235                 return err;
3236
3237         if (cmd.comp_mask)
3238                 return -EINVAL;
3239
3240         if (!capable(CAP_NET_RAW))
3241                 return -EPERM;
3242
3243         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3244                 return -EINVAL;
3245
3246         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3247             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3248              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3249                 return -EINVAL;
3250
3251         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3252                 return -EINVAL;
3253
3254         if (cmd.flow_attr.size >
3255             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3256                 return -EINVAL;
3257
3258         if (cmd.flow_attr.reserved[0] ||
3259             cmd.flow_attr.reserved[1])
3260                 return -EINVAL;
3261
3262         if (cmd.flow_attr.num_of_specs) {
3263                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3264                                          GFP_KERNEL);
3265                 if (!kern_flow_attr)
3266                         return -ENOMEM;
3267
3268                 *kern_flow_attr = cmd.flow_attr;
3269                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3270                                           cmd.flow_attr.size);
3271                 if (err)
3272                         goto err_free_attr;
3273         } else {
3274                 kern_flow_attr = &cmd.flow_attr;
3275         }
3276
3277         err = uverbs_request_finish(&iter);
3278         if (err)
3279                 goto err_free_attr;
3280
3281         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3282         if (IS_ERR(uobj)) {
3283                 err = PTR_ERR(uobj);
3284                 goto err_free_attr;
3285         }
3286
3287         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3288         if (!qp) {
3289                 err = -EINVAL;
3290                 goto err_uobj;
3291         }
3292
3293         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3294                 err = -EINVAL;
3295                 goto err_put;
3296         }
3297
3298         flow_attr = kzalloc(struct_size(flow_attr, flows,
3299                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3300         if (!flow_attr) {
3301                 err = -ENOMEM;
3302                 goto err_put;
3303         }
3304         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3305         if (!uflow_res) {
3306                 err = -ENOMEM;
3307                 goto err_free_flow_attr;
3308         }
3309
3310         flow_attr->type = kern_flow_attr->type;
3311         flow_attr->priority = kern_flow_attr->priority;
3312         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3313         flow_attr->port = kern_flow_attr->port;
3314         flow_attr->flags = kern_flow_attr->flags;
3315         flow_attr->size = sizeof(*flow_attr);
3316
3317         kern_spec = kern_flow_attr->flow_specs;
3318         ib_spec = flow_attr + 1;
3319         for (i = 0; i < flow_attr->num_of_specs &&
3320                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3321                         cmd.flow_attr.size >= kern_spec->size;
3322              i++) {
3323                 err = kern_spec_to_ib_spec(
3324                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3325                                 ib_spec, uflow_res);
3326                 if (err)
3327                         goto err_free;
3328
3329                 flow_attr->size +=
3330                         ((union ib_flow_spec *) ib_spec)->size;
3331                 cmd.flow_attr.size -= kern_spec->size;
3332                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3333                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3334         }
3335         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3336                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3337                         i, cmd.flow_attr.size);
3338                 err = -EINVAL;
3339                 goto err_free;
3340         }
3341
3342         flow_id = qp->device->ops.create_flow(
3343                 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
3344
3345         if (IS_ERR(flow_id)) {
3346                 err = PTR_ERR(flow_id);
3347                 goto err_free;
3348         }
3349
3350         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3351
3352         memset(&resp, 0, sizeof(resp));
3353         resp.flow_handle = uobj->id;
3354
3355         err = uverbs_response(attrs, &resp, sizeof(resp));
3356         if (err)
3357                 goto err_copy;
3358
3359         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3360                                 UVERBS_LOOKUP_READ);
3361         kfree(flow_attr);
3362         if (cmd.flow_attr.num_of_specs)
3363                 kfree(kern_flow_attr);
3364         rdma_alloc_commit_uobject(uobj, attrs);
3365         return 0;
3366 err_copy:
3367         if (!qp->device->ops.destroy_flow(flow_id))
3368                 atomic_dec(&qp->usecnt);
3369 err_free:
3370         ib_uverbs_flow_resources_free(uflow_res);
3371 err_free_flow_attr:
3372         kfree(flow_attr);
3373 err_put:
3374         rdma_lookup_put_uobject(&qp->uobject->uevent.uobject,
3375                                 UVERBS_LOOKUP_READ);
3376 err_uobj:
3377         uobj_alloc_abort(uobj, attrs);
3378 err_free_attr:
3379         if (cmd.flow_attr.num_of_specs)
3380                 kfree(kern_flow_attr);
3381         return err;
3382 }
3383
3384 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3385 {
3386         struct ib_uverbs_destroy_flow   cmd;
3387         int                             ret;
3388
3389         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3390         if (ret)
3391                 return ret;
3392
3393         if (cmd.comp_mask)
3394                 return -EINVAL;
3395
3396         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3397 }
3398
3399 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3400                                 struct ib_uverbs_create_xsrq *cmd,
3401                                 struct ib_udata *udata)
3402 {
3403         struct ib_uverbs_create_srq_resp resp;
3404         struct ib_usrq_object           *obj;
3405         struct ib_pd                    *pd;
3406         struct ib_srq                   *srq;
3407         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3408         struct ib_srq_init_attr          attr;
3409         int ret;
3410         struct ib_device *ib_dev;
3411
3412         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3413                                                   &ib_dev);
3414         if (IS_ERR(obj))
3415                 return PTR_ERR(obj);
3416
3417         if (cmd->srq_type == IB_SRQT_TM)
3418                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3419
3420         if (cmd->srq_type == IB_SRQT_XRC) {
3421                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3422                                           attrs);
3423                 if (IS_ERR(xrcd_uobj)) {
3424                         ret = -EINVAL;
3425                         goto err;
3426                 }
3427
3428                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3429                 if (!attr.ext.xrc.xrcd) {
3430                         ret = -EINVAL;
3431                         goto err_put_xrcd;
3432                 }
3433
3434                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3435                 atomic_inc(&obj->uxrcd->refcnt);
3436         }
3437
3438         if (ib_srq_has_cq(cmd->srq_type)) {
3439                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3440                                                 cmd->cq_handle, attrs);
3441                 if (!attr.ext.cq) {
3442                         ret = -EINVAL;
3443                         goto err_put_xrcd;
3444                 }
3445         }
3446
3447         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3448         if (!pd) {
3449                 ret = -EINVAL;
3450                 goto err_put_cq;
3451         }
3452
3453         attr.event_handler  = ib_uverbs_srq_event_handler;
3454         attr.srq_context    = attrs->ufile;
3455         attr.srq_type       = cmd->srq_type;
3456         attr.attr.max_wr    = cmd->max_wr;
3457         attr.attr.max_sge   = cmd->max_sge;
3458         attr.attr.srq_limit = cmd->srq_limit;
3459
3460         INIT_LIST_HEAD(&obj->uevent.event_list);
3461
3462         srq = rdma_zalloc_drv_obj(ib_dev, ib_srq);
3463         if (!srq) {
3464                 ret = -ENOMEM;
3465                 goto err_put;
3466         }
3467
3468         srq->device        = pd->device;
3469         srq->pd            = pd;
3470         srq->srq_type      = cmd->srq_type;
3471         srq->uobject       = obj;
3472         srq->event_handler = attr.event_handler;
3473         srq->srq_context   = attr.srq_context;
3474
3475         ret = pd->device->ops.create_srq(srq, &attr, udata);
3476         if (ret)
3477                 goto err_free;
3478
3479         if (ib_srq_has_cq(cmd->srq_type)) {
3480                 srq->ext.cq       = attr.ext.cq;
3481                 atomic_inc(&attr.ext.cq->usecnt);
3482         }
3483
3484         if (cmd->srq_type == IB_SRQT_XRC) {
3485                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3486                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3487         }
3488
3489         atomic_inc(&pd->usecnt);
3490         atomic_set(&srq->usecnt, 0);
3491
3492         obj->uevent.uobject.object = srq;
3493         obj->uevent.uobject.user_handle = cmd->user_handle;
3494
3495         memset(&resp, 0, sizeof resp);
3496         resp.srq_handle = obj->uevent.uobject.id;
3497         resp.max_wr     = attr.attr.max_wr;
3498         resp.max_sge    = attr.attr.max_sge;
3499         if (cmd->srq_type == IB_SRQT_XRC)
3500                 resp.srqn = srq->ext.xrc.srq_num;
3501
3502         ret = uverbs_response(attrs, &resp, sizeof(resp));
3503         if (ret)
3504                 goto err_copy;
3505
3506         if (cmd->srq_type == IB_SRQT_XRC)
3507                 uobj_put_read(xrcd_uobj);
3508
3509         if (ib_srq_has_cq(cmd->srq_type))
3510                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3511                                         UVERBS_LOOKUP_READ);
3512
3513         uobj_put_obj_read(pd);
3514         rdma_alloc_commit_uobject(&obj->uevent.uobject, attrs);
3515         return 0;
3516
3517 err_copy:
3518         ib_destroy_srq_user(srq, uverbs_get_cleared_udata(attrs));
3519         /* It was released in ib_destroy_srq_user */
3520         srq = NULL;
3521 err_free:
3522         kfree(srq);
3523 err_put:
3524         uobj_put_obj_read(pd);
3525
3526 err_put_cq:
3527         if (ib_srq_has_cq(cmd->srq_type))
3528                 rdma_lookup_put_uobject(&attr.ext.cq->uobject->uevent.uobject,
3529                                         UVERBS_LOOKUP_READ);
3530
3531 err_put_xrcd:
3532         if (cmd->srq_type == IB_SRQT_XRC) {
3533                 atomic_dec(&obj->uxrcd->refcnt);
3534                 uobj_put_read(xrcd_uobj);
3535         }
3536
3537 err:
3538         uobj_alloc_abort(&obj->uevent.uobject, attrs);
3539         return ret;
3540 }
3541
3542 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3543 {
3544         struct ib_uverbs_create_srq      cmd;
3545         struct ib_uverbs_create_xsrq     xcmd;
3546         int ret;
3547
3548         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3549         if (ret)
3550                 return ret;
3551
3552         memset(&xcmd, 0, sizeof(xcmd));
3553         xcmd.response    = cmd.response;
3554         xcmd.user_handle = cmd.user_handle;
3555         xcmd.srq_type    = IB_SRQT_BASIC;
3556         xcmd.pd_handle   = cmd.pd_handle;
3557         xcmd.max_wr      = cmd.max_wr;
3558         xcmd.max_sge     = cmd.max_sge;
3559         xcmd.srq_limit   = cmd.srq_limit;
3560
3561         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3562 }
3563
3564 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3565 {
3566         struct ib_uverbs_create_xsrq     cmd;
3567         int ret;
3568
3569         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3570         if (ret)
3571                 return ret;
3572
3573         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3574 }
3575
3576 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3577 {
3578         struct ib_uverbs_modify_srq cmd;
3579         struct ib_srq              *srq;
3580         struct ib_srq_attr          attr;
3581         int                         ret;
3582
3583         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3584         if (ret)
3585                 return ret;
3586
3587         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3588         if (!srq)
3589                 return -EINVAL;
3590
3591         attr.max_wr    = cmd.max_wr;
3592         attr.srq_limit = cmd.srq_limit;
3593
3594         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3595                                           &attrs->driver_udata);
3596
3597         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3598                                 UVERBS_LOOKUP_READ);
3599
3600         return ret;
3601 }
3602
3603 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3604 {
3605         struct ib_uverbs_query_srq      cmd;
3606         struct ib_uverbs_query_srq_resp resp;
3607         struct ib_srq_attr              attr;
3608         struct ib_srq                   *srq;
3609         int                             ret;
3610
3611         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3612         if (ret)
3613                 return ret;
3614
3615         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3616         if (!srq)
3617                 return -EINVAL;
3618
3619         ret = ib_query_srq(srq, &attr);
3620
3621         rdma_lookup_put_uobject(&srq->uobject->uevent.uobject,
3622                                 UVERBS_LOOKUP_READ);
3623
3624         if (ret)
3625                 return ret;
3626
3627         memset(&resp, 0, sizeof resp);
3628
3629         resp.max_wr    = attr.max_wr;
3630         resp.max_sge   = attr.max_sge;
3631         resp.srq_limit = attr.srq_limit;
3632
3633         return uverbs_response(attrs, &resp, sizeof(resp));
3634 }
3635
3636 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3637 {
3638         struct ib_uverbs_destroy_srq      cmd;
3639         struct ib_uverbs_destroy_srq_resp resp;
3640         struct ib_uobject                *uobj;
3641         struct ib_uevent_object          *obj;
3642         int ret;
3643
3644         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3645         if (ret)
3646                 return ret;
3647
3648         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3649         if (IS_ERR(uobj))
3650                 return PTR_ERR(uobj);
3651
3652         obj = container_of(uobj, struct ib_uevent_object, uobject);
3653         memset(&resp, 0, sizeof(resp));
3654         resp.events_reported = obj->events_reported;
3655
3656         uobj_put_destroy(uobj);
3657
3658         return uverbs_response(attrs, &resp, sizeof(resp));
3659 }
3660
3661 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3662 {
3663         struct ib_uverbs_ex_query_device_resp resp = {};
3664         struct ib_uverbs_ex_query_device  cmd;
3665         struct ib_device_attr attr = {0};
3666         struct ib_ucontext *ucontext;
3667         struct ib_device *ib_dev;
3668         int err;
3669
3670         ucontext = ib_uverbs_get_ucontext(attrs);
3671         if (IS_ERR(ucontext))
3672                 return PTR_ERR(ucontext);
3673         ib_dev = ucontext->device;
3674
3675         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3676         if (err)
3677                 return err;
3678
3679         if (cmd.comp_mask)
3680                 return -EINVAL;
3681
3682         if (cmd.reserved)
3683                 return -EINVAL;
3684
3685         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3686         if (err)
3687                 return err;
3688
3689         copy_query_dev_fields(ucontext, &resp.base, &attr);
3690
3691         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3692         resp.odp_caps.per_transport_caps.rc_odp_caps =
3693                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3694         resp.odp_caps.per_transport_caps.uc_odp_caps =
3695                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3696         resp.odp_caps.per_transport_caps.ud_odp_caps =
3697                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3698         resp.xrc_odp_caps = attr.odp_caps.per_transport_caps.xrc_odp_caps;
3699
3700         resp.timestamp_mask = attr.timestamp_mask;
3701         resp.hca_core_clock = attr.hca_core_clock;
3702         resp.device_cap_flags_ex = attr.device_cap_flags;
3703         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3704         resp.rss_caps.max_rwq_indirection_tables =
3705                 attr.rss_caps.max_rwq_indirection_tables;
3706         resp.rss_caps.max_rwq_indirection_table_size =
3707                 attr.rss_caps.max_rwq_indirection_table_size;
3708         resp.max_wq_type_rq = attr.max_wq_type_rq;
3709         resp.raw_packet_caps = attr.raw_packet_caps;
3710         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3711         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3712         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3713         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3714         resp.tm_caps.flags              = attr.tm_caps.flags;
3715         resp.cq_moderation_caps.max_cq_moderation_count  =
3716                 attr.cq_caps.max_cq_moderation_count;
3717         resp.cq_moderation_caps.max_cq_moderation_period =
3718                 attr.cq_caps.max_cq_moderation_period;
3719         resp.max_dm_size = attr.max_dm_size;
3720         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3721
3722         return uverbs_response(attrs, &resp, sizeof(resp));
3723 }
3724
3725 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3726 {
3727         struct ib_uverbs_ex_modify_cq cmd;
3728         struct ib_cq *cq;
3729         int ret;
3730
3731         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3732         if (ret)
3733                 return ret;
3734
3735         if (!cmd.attr_mask || cmd.reserved)
3736                 return -EINVAL;
3737
3738         if (cmd.attr_mask > IB_CQ_MODERATE)
3739                 return -EOPNOTSUPP;
3740
3741         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3742         if (!cq)
3743                 return -EINVAL;
3744
3745         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3746
3747         rdma_lookup_put_uobject(&cq->uobject->uevent.uobject,
3748                                 UVERBS_LOOKUP_READ);
3749         return ret;
3750 }
3751
3752 /*
3753  * Describe the input structs for write(). Some write methods have an input
3754  * only struct, most have an input and output. If the struct has an output then
3755  * the 'response' u64 must be the first field in the request structure.
3756  *
3757  * If udata is present then both the request and response structs have a
3758  * trailing driver_data flex array. In this case the size of the base struct
3759  * cannot be changed.
3760  */
3761 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3762         .write.has_resp = 1 +                                                  \
3763                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3764                           BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) !=    \
3765                                             sizeof(u64)),                      \
3766         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3767
3768 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3769
3770 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3771         UAPI_DEF_WRITE_IO(req, resp),                                          \
3772                 .write.has_udata =                                             \
3773                         1 +                                                    \
3774                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3775                                           sizeof(req)) +                       \
3776                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3777                                           sizeof(resp))
3778
3779 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3780         UAPI_DEF_WRITE_I(req),                                                 \
3781                 .write.has_udata =                                             \
3782                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3783                                               sizeof(req))
3784
3785 /*
3786  * The _EX versions are for use with WRITE_EX and allow the last struct member
3787  * to be specified. Buffers that do not include that member will be rejected.
3788  */
3789 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3790         .write.has_resp = 1,                                                   \
3791         .write.req_size = offsetofend(req, req_last_member),                   \
3792         .write.resp_size = offsetofend(resp, resp_last_member)
3793
3794 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3795         .write.req_size = offsetofend(req, req_last_member)
3796
3797 const struct uapi_definition uverbs_def_write_intf[] = {
3798         DECLARE_UVERBS_OBJECT(
3799                 UVERBS_OBJECT_AH,
3800                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3801                                      ib_uverbs_create_ah,
3802                                      UAPI_DEF_WRITE_UDATA_IO(
3803                                              struct ib_uverbs_create_ah,
3804                                              struct ib_uverbs_create_ah_resp),
3805                                      UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3806                 DECLARE_UVERBS_WRITE(
3807                         IB_USER_VERBS_CMD_DESTROY_AH,
3808                         ib_uverbs_destroy_ah,
3809                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3810                         UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3811
3812         DECLARE_UVERBS_OBJECT(
3813                 UVERBS_OBJECT_COMP_CHANNEL,
3814                 DECLARE_UVERBS_WRITE(
3815                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3816                         ib_uverbs_create_comp_channel,
3817                         UAPI_DEF_WRITE_IO(
3818                                 struct ib_uverbs_create_comp_channel,
3819                                 struct ib_uverbs_create_comp_channel_resp))),
3820
3821         DECLARE_UVERBS_OBJECT(
3822                 UVERBS_OBJECT_CQ,
3823                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3824                                      ib_uverbs_create_cq,
3825                                      UAPI_DEF_WRITE_UDATA_IO(
3826                                              struct ib_uverbs_create_cq,
3827                                              struct ib_uverbs_create_cq_resp),
3828                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3829                 DECLARE_UVERBS_WRITE(
3830                         IB_USER_VERBS_CMD_DESTROY_CQ,
3831                         ib_uverbs_destroy_cq,
3832                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3833                                           struct ib_uverbs_destroy_cq_resp),
3834                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3835                 DECLARE_UVERBS_WRITE(
3836                         IB_USER_VERBS_CMD_POLL_CQ,
3837                         ib_uverbs_poll_cq,
3838                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3839                                           struct ib_uverbs_poll_cq_resp),
3840                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3841                 DECLARE_UVERBS_WRITE(
3842                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3843                         ib_uverbs_req_notify_cq,
3844                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3845                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3846                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3847                                      ib_uverbs_resize_cq,
3848                                      UAPI_DEF_WRITE_UDATA_IO(
3849                                              struct ib_uverbs_resize_cq,
3850                                              struct ib_uverbs_resize_cq_resp),
3851                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3852                 DECLARE_UVERBS_WRITE_EX(
3853                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3854                         ib_uverbs_ex_create_cq,
3855                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3856                                              reserved,
3857                                              struct ib_uverbs_ex_create_cq_resp,
3858                                              response_length),
3859                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3860                 DECLARE_UVERBS_WRITE_EX(
3861                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3862                         ib_uverbs_ex_modify_cq,
3863                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3864                         UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
3865
3866         DECLARE_UVERBS_OBJECT(
3867                 UVERBS_OBJECT_DEVICE,
3868                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3869                                      ib_uverbs_get_context,
3870                                      UAPI_DEF_WRITE_UDATA_IO(
3871                                              struct ib_uverbs_get_context,
3872                                              struct ib_uverbs_get_context_resp)),
3873                 DECLARE_UVERBS_WRITE(
3874                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3875                         ib_uverbs_query_device,
3876                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3877                                           struct ib_uverbs_query_device_resp)),
3878                 DECLARE_UVERBS_WRITE(
3879                         IB_USER_VERBS_CMD_QUERY_PORT,
3880                         ib_uverbs_query_port,
3881                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3882                                           struct ib_uverbs_query_port_resp),
3883                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3884                 DECLARE_UVERBS_WRITE_EX(
3885                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3886                         ib_uverbs_ex_query_device,
3887                         UAPI_DEF_WRITE_IO_EX(
3888                                 struct ib_uverbs_ex_query_device,
3889                                 reserved,
3890                                 struct ib_uverbs_ex_query_device_resp,
3891                                 response_length),
3892                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3893                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3894                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3895
3896         DECLARE_UVERBS_OBJECT(
3897                 UVERBS_OBJECT_FLOW,
3898                 DECLARE_UVERBS_WRITE_EX(
3899                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3900                         ib_uverbs_ex_create_flow,
3901                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3902                                              flow_attr,
3903                                              struct ib_uverbs_create_flow_resp,
3904                                              flow_handle),
3905                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3906                 DECLARE_UVERBS_WRITE_EX(
3907                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3908                         ib_uverbs_ex_destroy_flow,
3909                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3910                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3911
3912         DECLARE_UVERBS_OBJECT(
3913                 UVERBS_OBJECT_MR,
3914                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3915                                      ib_uverbs_dereg_mr,
3916                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3917                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3918                 DECLARE_UVERBS_WRITE(
3919                         IB_USER_VERBS_CMD_REG_MR,
3920                         ib_uverbs_reg_mr,
3921                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3922                                                 struct ib_uverbs_reg_mr_resp),
3923                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3924                 DECLARE_UVERBS_WRITE(
3925                         IB_USER_VERBS_CMD_REREG_MR,
3926                         ib_uverbs_rereg_mr,
3927                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3928                                                 struct ib_uverbs_rereg_mr_resp),
3929                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3930
3931         DECLARE_UVERBS_OBJECT(
3932                 UVERBS_OBJECT_MW,
3933                 DECLARE_UVERBS_WRITE(
3934                         IB_USER_VERBS_CMD_ALLOC_MW,
3935                         ib_uverbs_alloc_mw,
3936                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3937                                                 struct ib_uverbs_alloc_mw_resp),
3938                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3939                 DECLARE_UVERBS_WRITE(
3940                         IB_USER_VERBS_CMD_DEALLOC_MW,
3941                         ib_uverbs_dealloc_mw,
3942                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3943                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3944
3945         DECLARE_UVERBS_OBJECT(
3946                 UVERBS_OBJECT_PD,
3947                 DECLARE_UVERBS_WRITE(
3948                         IB_USER_VERBS_CMD_ALLOC_PD,
3949                         ib_uverbs_alloc_pd,
3950                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3951                                                 struct ib_uverbs_alloc_pd_resp),
3952                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3953                 DECLARE_UVERBS_WRITE(
3954                         IB_USER_VERBS_CMD_DEALLOC_PD,
3955                         ib_uverbs_dealloc_pd,
3956                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3957                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3958
3959         DECLARE_UVERBS_OBJECT(
3960                 UVERBS_OBJECT_QP,
3961                 DECLARE_UVERBS_WRITE(
3962                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3963                         ib_uverbs_attach_mcast,
3964                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3965                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3966                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3967                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3968                                      ib_uverbs_create_qp,
3969                                      UAPI_DEF_WRITE_UDATA_IO(
3970                                              struct ib_uverbs_create_qp,
3971                                              struct ib_uverbs_create_qp_resp),
3972                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3973                 DECLARE_UVERBS_WRITE(
3974                         IB_USER_VERBS_CMD_DESTROY_QP,
3975                         ib_uverbs_destroy_qp,
3976                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3977                                           struct ib_uverbs_destroy_qp_resp),
3978                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3979                 DECLARE_UVERBS_WRITE(
3980                         IB_USER_VERBS_CMD_DETACH_MCAST,
3981                         ib_uverbs_detach_mcast,
3982                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3983                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3984                 DECLARE_UVERBS_WRITE(
3985                         IB_USER_VERBS_CMD_MODIFY_QP,
3986                         ib_uverbs_modify_qp,
3987                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3988                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3989                 DECLARE_UVERBS_WRITE(
3990                         IB_USER_VERBS_CMD_POST_RECV,
3991                         ib_uverbs_post_recv,
3992                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3993                                           struct ib_uverbs_post_recv_resp),
3994                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3995                 DECLARE_UVERBS_WRITE(
3996                         IB_USER_VERBS_CMD_POST_SEND,
3997                         ib_uverbs_post_send,
3998                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3999                                           struct ib_uverbs_post_send_resp),
4000                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
4001                 DECLARE_UVERBS_WRITE(
4002                         IB_USER_VERBS_CMD_QUERY_QP,
4003                         ib_uverbs_query_qp,
4004                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
4005                                           struct ib_uverbs_query_qp_resp),
4006                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
4007                 DECLARE_UVERBS_WRITE_EX(
4008                         IB_USER_VERBS_EX_CMD_CREATE_QP,
4009                         ib_uverbs_ex_create_qp,
4010                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
4011                                              comp_mask,
4012                                              struct ib_uverbs_ex_create_qp_resp,
4013                                              response_length),
4014                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
4015                 DECLARE_UVERBS_WRITE_EX(
4016                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
4017                         ib_uverbs_ex_modify_qp,
4018                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
4019                                              base,
4020                                              struct ib_uverbs_ex_modify_qp_resp,
4021                                              response_length),
4022                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
4023
4024         DECLARE_UVERBS_OBJECT(
4025                 UVERBS_OBJECT_RWQ_IND_TBL,
4026                 DECLARE_UVERBS_WRITE_EX(
4027                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
4028                         ib_uverbs_ex_create_rwq_ind_table,
4029                         UAPI_DEF_WRITE_IO_EX(
4030                                 struct ib_uverbs_ex_create_rwq_ind_table,
4031                                 log_ind_tbl_size,
4032                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
4033                                 ind_tbl_num),
4034                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
4035                 DECLARE_UVERBS_WRITE_EX(
4036                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
4037                         ib_uverbs_ex_destroy_rwq_ind_table,
4038                         UAPI_DEF_WRITE_I(
4039                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
4040                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
4041
4042         DECLARE_UVERBS_OBJECT(
4043                 UVERBS_OBJECT_WQ,
4044                 DECLARE_UVERBS_WRITE_EX(
4045                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
4046                         ib_uverbs_ex_create_wq,
4047                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
4048                                              max_sge,
4049                                              struct ib_uverbs_ex_create_wq_resp,
4050                                              wqn),
4051                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
4052                 DECLARE_UVERBS_WRITE_EX(
4053                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
4054                         ib_uverbs_ex_destroy_wq,
4055                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
4056                                              wq_handle,
4057                                              struct ib_uverbs_ex_destroy_wq_resp,
4058                                              reserved),
4059                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
4060                 DECLARE_UVERBS_WRITE_EX(
4061                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
4062                         ib_uverbs_ex_modify_wq,
4063                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
4064                                             curr_wq_state),
4065                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
4066
4067         DECLARE_UVERBS_OBJECT(
4068                 UVERBS_OBJECT_SRQ,
4069                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4070                                      ib_uverbs_create_srq,
4071                                      UAPI_DEF_WRITE_UDATA_IO(
4072                                              struct ib_uverbs_create_srq,
4073                                              struct ib_uverbs_create_srq_resp),
4074                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4075                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4076                                      ib_uverbs_create_xsrq,
4077                                      UAPI_DEF_WRITE_UDATA_IO(
4078                                              struct ib_uverbs_create_xsrq,
4079                                              struct ib_uverbs_create_srq_resp),
4080                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4081                 DECLARE_UVERBS_WRITE(
4082                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4083                         ib_uverbs_destroy_srq,
4084                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4085                                           struct ib_uverbs_destroy_srq_resp),
4086                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4087                 DECLARE_UVERBS_WRITE(
4088                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4089                         ib_uverbs_modify_srq,
4090                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4091                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4092                 DECLARE_UVERBS_WRITE(
4093                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4094                         ib_uverbs_post_srq_recv,
4095                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4096                                           struct ib_uverbs_post_srq_recv_resp),
4097                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4098                 DECLARE_UVERBS_WRITE(
4099                         IB_USER_VERBS_CMD_QUERY_SRQ,
4100                         ib_uverbs_query_srq,
4101                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4102                                           struct ib_uverbs_query_srq_resp),
4103                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4104
4105         DECLARE_UVERBS_OBJECT(
4106                 UVERBS_OBJECT_XRCD,
4107                 DECLARE_UVERBS_WRITE(
4108                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4109                         ib_uverbs_close_xrcd,
4110                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4111                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4112                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4113                                      ib_uverbs_open_qp,
4114                                      UAPI_DEF_WRITE_UDATA_IO(
4115                                              struct ib_uverbs_open_qp,
4116                                              struct ib_uverbs_create_qp_resp)),
4117                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4118                                      ib_uverbs_open_xrcd,
4119                                      UAPI_DEF_WRITE_UDATA_IO(
4120                                              struct ib_uverbs_open_xrcd,
4121                                              struct ib_uverbs_open_xrcd_resp),
4122                                      UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4123
4124         {},
4125 };