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 (copy_to_user(attrs->ucore.outbuf, resp,
  64                          min(attrs->ucore.outlen, resp_len)))
  65                 return -EFAULT;
  66
  67         if (resp_len < attrs->ucore.outlen) {
  68                 /*
  69                  * Zero fill any extra memory that user
  70                  * space might have provided.
  71                  */
  72                 ret = clear_user(attrs->ucore.outbuf + resp_len,
  73                                  attrs->ucore.outlen - resp_len);
  74                 if (ret)
  75                         return -EFAULT;
  76         }
  77
  78         return 0;
  79 }
  80
  81 /*
  82  * Copy a request from userspace. If the provided 'req' is larger than the
  83  * user buffer then the user buffer is zero extended into the 'req'. If 'req'
  84  * is smaller than the user buffer then the uncopied bytes in the user buffer
  85  * must be zero.
  86  */
  87 static int uverbs_request(struct uverbs_attr_bundle *attrs, void *req,
  88                           size_t req_len)
  89 {
  90         if (copy_from_user(req, attrs->ucore.inbuf,
  91                            min(attrs->ucore.inlen, req_len)))
  92                 return -EFAULT;
  93
  94         if (attrs->ucore.inlen < req_len) {
  95                 memset(req + attrs->ucore.inlen, 0,
  96                        req_len - attrs->ucore.inlen);
  97         } else if (attrs->ucore.inlen > req_len) {
  98                 if (!ib_is_buffer_cleared(attrs->ucore.inbuf + req_len,
  99                                           attrs->ucore.inlen - req_len))
 100                         return -EOPNOTSUPP;
 101         }
 102         return 0;
 103 }
 104
 105 /*
 106  * Generate the value for the 'response_length' protocol used by write_ex.
 107  * This is the number of bytes the kernel actually wrote. Userspace can use
 108  * this to detect what structure members in the response the kernel
 109  * understood.
 110  */
 111 static u32 uverbs_response_length(struct uverbs_attr_bundle *attrs,
 112                                   size_t resp_len)
 113 {
 114         return min_t(size_t, attrs->ucore.outlen, resp_len);
 115 }
 116
 117 /*
 118  * The iterator version of the request interface is for handlers that need to
 119  * step over a flex array at the end of a command header.
 120  */
 121 struct uverbs_req_iter {
 122         const void __user *cur;
 123         const void __user *end;
 124 };
 125
 126 static int uverbs_request_start(struct uverbs_attr_bundle *attrs,
 127                                 struct uverbs_req_iter *iter,
 128                                 void *req,
 129                                 size_t req_len)
 130 {
 131         if (attrs->ucore.inlen < req_len)
 132                 return -ENOSPC;
 133
 134         if (copy_from_user(req, attrs->ucore.inbuf, req_len))
 135                 return -EFAULT;
 136
 137         iter->cur = attrs->ucore.inbuf + req_len;
 138         iter->end = attrs->ucore.inbuf + attrs->ucore.inlen;
 139         return 0;
 140 }
 141
 142 static int uverbs_request_next(struct uverbs_req_iter *iter, void *val,
 143                                size_t len)
 144 {
 145         if (iter->cur + len > iter->end)
 146                 return -ENOSPC;
 147
 148         if (copy_from_user(val, iter->cur, len))
 149                 return -EFAULT;
 150
 151         iter->cur += len;
 152         return 0;
 153 }
 154
 155 static const void __user *uverbs_request_next_ptr(struct uverbs_req_iter *iter,
 156                                                   size_t len)
 157 {
 158         const void __user *res = iter->cur;
 159
 160         if (iter->cur + len > iter->end)
 161                 return ERR_PTR(-ENOSPC);
 162         iter->cur += len;
 163         return res;
 164 }
 165
 166 static int uverbs_request_finish(struct uverbs_req_iter *iter)
 167 {
 168         if (!ib_is_buffer_cleared(iter->cur, iter->end - iter->cur))
 169                 return -EOPNOTSUPP;
 170         return 0;
 171 }
 172
 173 static struct ib_uverbs_completion_event_file *
 174 _ib_uverbs_lookup_comp_file(s32 fd, const struct uverbs_attr_bundle *attrs)
 175 {
 176         struct ib_uobject *uobj = ufd_get_read(UVERBS_OBJECT_COMP_CHANNEL,
 177                                                fd, attrs);
 178
 179         if (IS_ERR(uobj))
 180                 return (void *)uobj;
 181
 182         uverbs_uobject_get(uobj);
 183         uobj_put_read(uobj);
 184
 185         return container_of(uobj, struct ib_uverbs_completion_event_file,
 186                             uobj);
 187 }
 188 #define ib_uverbs_lookup_comp_file(_fd, _ufile)                                \
 189         _ib_uverbs_lookup_comp_file((_fd)*typecheck(s32, _fd), _ufile)
 190
 191 static int ib_uverbs_get_context(struct uverbs_attr_bundle *attrs)
 192 {
 193         struct ib_uverbs_file *file = attrs->ufile;
 194         struct ib_uverbs_get_context      cmd;
 195         struct ib_uverbs_get_context_resp resp;
 196         struct ib_ucontext               *ucontext;
 197         struct file                      *filp;
 198         struct ib_rdmacg_object          cg_obj;
 199         struct ib_device *ib_dev;
 200         int ret;
 201
 202         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 203         if (ret)
 204                 return ret;
 205
 206         mutex_lock(&file->ucontext_lock);
 207         ib_dev = srcu_dereference(file->device->ib_dev,
 208                                   &file->device->disassociate_srcu);
 209         if (!ib_dev) {
 210                 ret = -EIO;
 211                 goto err;
 212         }
 213
 214         if (file->ucontext) {
 215                 ret = -EINVAL;
 216                 goto err;
 217         }
 218
 219         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 220         if (ret)
 221                 goto err;
 222
 223         ucontext = ib_dev->ops.alloc_ucontext(ib_dev, &attrs->driver_udata);
 224         if (IS_ERR(ucontext)) {
 225                 ret = PTR_ERR(ucontext);
 226                 goto err_alloc;
 227         }
 228
 229         ucontext->device = ib_dev;
 230         ucontext->cg_obj = cg_obj;
 231         /* ufile is required when some objects are released */
 232         ucontext->ufile = file;
 233
 234         ucontext->closing = false;
 235         ucontext->cleanup_retryable = false;
 236
 237 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 238         mutex_init(&ucontext->per_mm_list_lock);
 239         INIT_LIST_HEAD(&ucontext->per_mm_list);
 240         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 241                 ucontext->invalidate_range = NULL;
 242
 243 #endif
 244
 245         resp.num_comp_vectors = file->device->num_comp_vectors;
 246
 247         ret = get_unused_fd_flags(O_CLOEXEC);
 248         if (ret < 0)
 249                 goto err_free;
 250         resp.async_fd = ret;
 251
 252         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 253         if (IS_ERR(filp)) {
 254                 ret = PTR_ERR(filp);
 255                 goto err_fd;
 256         }
 257
 258         ret = uverbs_response(attrs, &resp, sizeof(resp));
 259         if (ret)
 260                 goto err_file;
 261
 262         fd_install(resp.async_fd, filp);
 263
 264         ucontext->res.type = RDMA_RESTRACK_CTX;
 265         rdma_restrack_uadd(&ucontext->res);
 266
 267         /*
 268          * Make sure that ib_uverbs_get_ucontext() sees the pointer update
 269          * only after all writes to setup the ucontext have completed
 270          */
 271         smp_store_release(&file->ucontext, ucontext);
 272
 273         mutex_unlock(&file->ucontext_lock);
 274
 275         return 0;
 276
 277 err_file:
 278         ib_uverbs_free_async_event_file(file);
 279         fput(filp);
 280
 281 err_fd:
 282         put_unused_fd(resp.async_fd);
 283
 284 err_free:
 285         ib_dev->ops.dealloc_ucontext(ucontext);
 286
 287 err_alloc:
 288         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 289
 290 err:
 291         mutex_unlock(&file->ucontext_lock);
 292         return ret;
 293 }
 294
 295 static void copy_query_dev_fields(struct ib_ucontext *ucontext,
 296                                   struct ib_uverbs_query_device_resp *resp,
 297                                   struct ib_device_attr *attr)
 298 {
 299         struct ib_device *ib_dev = ucontext->device;
 300
 301         resp->fw_ver            = attr->fw_ver;
 302         resp->node_guid         = ib_dev->node_guid;
 303         resp->sys_image_guid    = attr->sys_image_guid;
 304         resp->max_mr_size       = attr->max_mr_size;
 305         resp->page_size_cap     = attr->page_size_cap;
 306         resp->vendor_id         = attr->vendor_id;
 307         resp->vendor_part_id    = attr->vendor_part_id;
 308         resp->hw_ver            = attr->hw_ver;
 309         resp->max_qp            = attr->max_qp;
 310         resp->max_qp_wr         = attr->max_qp_wr;
 311         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 312         resp->max_sge           = min(attr->max_send_sge, attr->max_recv_sge);
 313         resp->max_sge_rd        = attr->max_sge_rd;
 314         resp->max_cq            = attr->max_cq;
 315         resp->max_cqe           = attr->max_cqe;
 316         resp->max_mr            = attr->max_mr;
 317         resp->max_pd            = attr->max_pd;
 318         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 319         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 320         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 321         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 322         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 323         resp->atomic_cap                = attr->atomic_cap;
 324         resp->max_ee                    = attr->max_ee;
 325         resp->max_rdd                   = attr->max_rdd;
 326         resp->max_mw                    = attr->max_mw;
 327         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 328         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 329         resp->max_mcast_grp             = attr->max_mcast_grp;
 330         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 331         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 332         resp->max_ah                    = attr->max_ah;
 333         resp->max_fmr                   = attr->max_fmr;
 334         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 335         resp->max_srq                   = attr->max_srq;
 336         resp->max_srq_wr                = attr->max_srq_wr;
 337         resp->max_srq_sge               = attr->max_srq_sge;
 338         resp->max_pkeys                 = attr->max_pkeys;
 339         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 340         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 341 }
 342
 343 static int ib_uverbs_query_device(struct uverbs_attr_bundle *attrs)
 344 {
 345         struct ib_uverbs_query_device      cmd;
 346         struct ib_uverbs_query_device_resp resp;
 347         struct ib_ucontext *ucontext;
 348         int ret;
 349
 350         ucontext = ib_uverbs_get_ucontext(attrs);
 351         if (IS_ERR(ucontext))
 352                 return PTR_ERR(ucontext);
 353
 354         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 355         if (ret)
 356                 return ret;
 357
 358         memset(&resp, 0, sizeof resp);
 359         copy_query_dev_fields(ucontext, &resp, &ucontext->device->attrs);
 360
 361         return uverbs_response(attrs, &resp, sizeof(resp));
 362 }
 363
 364 /*
 365  * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
 366  * PortInfo CapabilityMask, but was extended with unique bits.
 367  */
 368 static u32 make_port_cap_flags(const struct ib_port_attr *attr)
 369 {
 370         u32 res;
 371
 372         /* All IBA CapabilityMask bits are passed through here, except bit 26,
 373          * which is overridden with IP_BASED_GIDS. This is due to a historical
 374          * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
 375          * bits match the IBA definition across all kernel versions.
 376          */
 377         res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
 378
 379         if (attr->ip_gids)
 380                 res |= IB_UVERBS_PCF_IP_BASED_GIDS;
 381
 382         return res;
 383 }
 384
 385 static int ib_uverbs_query_port(struct uverbs_attr_bundle *attrs)
 386 {
 387         struct ib_uverbs_query_port      cmd;
 388         struct ib_uverbs_query_port_resp resp;
 389         struct ib_port_attr              attr;
 390         int                              ret;
 391         struct ib_ucontext *ucontext;
 392         struct ib_device *ib_dev;
 393
 394         ucontext = ib_uverbs_get_ucontext(attrs);
 395         if (IS_ERR(ucontext))
 396                 return PTR_ERR(ucontext);
 397         ib_dev = ucontext->device;
 398
 399         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 400         if (ret)
 401                 return ret;
 402
 403         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 404         if (ret)
 405                 return ret;
 406
 407         memset(&resp, 0, sizeof resp);
 408
 409         resp.state           = attr.state;
 410         resp.max_mtu         = attr.max_mtu;
 411         resp.active_mtu      = attr.active_mtu;
 412         resp.gid_tbl_len     = attr.gid_tbl_len;
 413         resp.port_cap_flags  = make_port_cap_flags(&attr);
 414         resp.max_msg_sz      = attr.max_msg_sz;
 415         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 416         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 417         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 418
 419         if (rdma_is_grh_required(ib_dev, cmd.port_num))
 420                 resp.flags |= IB_UVERBS_QPF_GRH_REQUIRED;
 421
 422         if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
 423                 resp.lid     = OPA_TO_IB_UCAST_LID(attr.lid);
 424                 resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
 425         } else {
 426                 resp.lid     = ib_lid_cpu16(attr.lid);
 427                 resp.sm_lid  = ib_lid_cpu16(attr.sm_lid);
 428         }
 429         resp.lmc             = attr.lmc;
 430         resp.max_vl_num      = attr.max_vl_num;
 431         resp.sm_sl           = attr.sm_sl;
 432         resp.subnet_timeout  = attr.subnet_timeout;
 433         resp.init_type_reply = attr.init_type_reply;
 434         resp.active_width    = attr.active_width;
 435         resp.active_speed    = attr.active_speed;
 436         resp.phys_state      = attr.phys_state;
 437         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 438                                                         cmd.port_num);
 439
 440         return uverbs_response(attrs, &resp, sizeof(resp));
 441 }
 442
 443 static int ib_uverbs_alloc_pd(struct uverbs_attr_bundle *attrs)
 444 {
 445         struct ib_uverbs_alloc_pd      cmd;
 446         struct ib_uverbs_alloc_pd_resp resp;
 447         struct ib_uobject             *uobj;
 448         struct ib_pd                  *pd;
 449         int                            ret;
 450         struct ib_device *ib_dev;
 451
 452         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 453         if (ret)
 454                 return ret;
 455
 456         uobj = uobj_alloc(UVERBS_OBJECT_PD, attrs, &ib_dev);
 457         if (IS_ERR(uobj))
 458                 return PTR_ERR(uobj);
 459
 460         pd = ib_dev->ops.alloc_pd(ib_dev, uobj->context, &attrs->driver_udata);
 461         if (IS_ERR(pd)) {
 462                 ret = PTR_ERR(pd);
 463                 goto err;
 464         }
 465
 466         pd->device  = ib_dev;
 467         pd->uobject = uobj;
 468         pd->__internal_mr = NULL;
 469         atomic_set(&pd->usecnt, 0);
 470
 471         uobj->object = pd;
 472         memset(&resp, 0, sizeof resp);
 473         resp.pd_handle = uobj->id;
 474         pd->res.type = RDMA_RESTRACK_PD;
 475         rdma_restrack_uadd(&pd->res);
 476
 477         ret = uverbs_response(attrs, &resp, sizeof(resp));
 478         if (ret)
 479                 goto err_copy;
 480
 481         return uobj_alloc_commit(uobj);
 482
 483 err_copy:
 484         ib_dealloc_pd(pd);
 485
 486 err:
 487         uobj_alloc_abort(uobj);
 488         return ret;
 489 }
 490
 491 static int ib_uverbs_dealloc_pd(struct uverbs_attr_bundle *attrs)
 492 {
 493         struct ib_uverbs_dealloc_pd cmd;
 494         int ret;
 495
 496         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 497         if (ret)
 498                 return ret;
 499
 500         return uobj_perform_destroy(UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 501 }
 502
 503 struct xrcd_table_entry {
 504         struct rb_node  node;
 505         struct ib_xrcd *xrcd;
 506         struct inode   *inode;
 507 };
 508
 509 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 510                             struct inode *inode,
 511                             struct ib_xrcd *xrcd)
 512 {
 513         struct xrcd_table_entry *entry, *scan;
 514         struct rb_node **p = &dev->xrcd_tree.rb_node;
 515         struct rb_node *parent = NULL;
 516
 517         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 518         if (!entry)
 519                 return -ENOMEM;
 520
 521         entry->xrcd  = xrcd;
 522         entry->inode = inode;
 523
 524         while (*p) {
 525                 parent = *p;
 526                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 527
 528                 if (inode < scan->inode) {
 529                         p = &(*p)->rb_left;
 530                 } else if (inode > scan->inode) {
 531                         p = &(*p)->rb_right;
 532                 } else {
 533                         kfree(entry);
 534                         return -EEXIST;
 535                 }
 536         }
 537
 538         rb_link_node(&entry->node, parent, p);
 539         rb_insert_color(&entry->node, &dev->xrcd_tree);
 540         igrab(inode);
 541         return 0;
 542 }
 543
 544 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 545                                                   struct inode *inode)
 546 {
 547         struct xrcd_table_entry *entry;
 548         struct rb_node *p = dev->xrcd_tree.rb_node;
 549
 550         while (p) {
 551                 entry = rb_entry(p, struct xrcd_table_entry, node);
 552
 553                 if (inode < entry->inode)
 554                         p = p->rb_left;
 555                 else if (inode > entry->inode)
 556                         p = p->rb_right;
 557                 else
 558                         return entry;
 559         }
 560
 561         return NULL;
 562 }
 563
 564 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 565 {
 566         struct xrcd_table_entry *entry;
 567
 568         entry = xrcd_table_search(dev, inode);
 569         if (!entry)
 570                 return NULL;
 571
 572         return entry->xrcd;
 573 }
 574
 575 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 576                               struct inode *inode)
 577 {
 578         struct xrcd_table_entry *entry;
 579
 580         entry = xrcd_table_search(dev, inode);
 581         if (entry) {
 582                 iput(inode);
 583                 rb_erase(&entry->node, &dev->xrcd_tree);
 584                 kfree(entry);
 585         }
 586 }
 587
 588 static int ib_uverbs_open_xrcd(struct uverbs_attr_bundle *attrs)
 589 {
 590         struct ib_uverbs_device *ibudev = attrs->ufile->device;
 591         struct ib_uverbs_open_xrcd      cmd;
 592         struct ib_uverbs_open_xrcd_resp resp;
 593         struct ib_uxrcd_object         *obj;
 594         struct ib_xrcd                 *xrcd = NULL;
 595         struct fd                       f = {NULL, 0};
 596         struct inode                   *inode = NULL;
 597         int                             ret = 0;
 598         int                             new_xrcd = 0;
 599         struct ib_device *ib_dev;
 600
 601         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 602         if (ret)
 603                 return ret;
 604
 605         mutex_lock(&ibudev->xrcd_tree_mutex);
 606
 607         if (cmd.fd != -1) {
 608                 /* search for file descriptor */
 609                 f = fdget(cmd.fd);
 610                 if (!f.file) {
 611                         ret = -EBADF;
 612                         goto err_tree_mutex_unlock;
 613                 }
 614
 615                 inode = file_inode(f.file);
 616                 xrcd = find_xrcd(ibudev, inode);
 617                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 618                         /* no file descriptor. Need CREATE flag */
 619                         ret = -EAGAIN;
 620                         goto err_tree_mutex_unlock;
 621                 }
 622
 623                 if (xrcd && cmd.oflags & O_EXCL) {
 624                         ret = -EINVAL;
 625                         goto err_tree_mutex_unlock;
 626                 }
 627         }
 628
 629         obj = (struct ib_uxrcd_object *)uobj_alloc(UVERBS_OBJECT_XRCD, attrs,
 630                                                    &ib_dev);
 631         if (IS_ERR(obj)) {
 632                 ret = PTR_ERR(obj);
 633                 goto err_tree_mutex_unlock;
 634         }
 635
 636         if (!xrcd) {
 637                 xrcd = ib_dev->ops.alloc_xrcd(ib_dev, obj->uobject.context,
 638                                               &attrs->driver_udata);
 639                 if (IS_ERR(xrcd)) {
 640                         ret = PTR_ERR(xrcd);
 641                         goto err;
 642                 }
 643
 644                 xrcd->inode   = inode;
 645                 xrcd->device  = ib_dev;
 646                 atomic_set(&xrcd->usecnt, 0);
 647                 mutex_init(&xrcd->tgt_qp_mutex);
 648                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 649                 new_xrcd = 1;
 650         }
 651
 652         atomic_set(&obj->refcnt, 0);
 653         obj->uobject.object = xrcd;
 654         memset(&resp, 0, sizeof resp);
 655         resp.xrcd_handle = obj->uobject.id;
 656
 657         if (inode) {
 658                 if (new_xrcd) {
 659                         /* create new inode/xrcd table entry */
 660                         ret = xrcd_table_insert(ibudev, inode, xrcd);
 661                         if (ret)
 662                                 goto err_dealloc_xrcd;
 663                 }
 664                 atomic_inc(&xrcd->usecnt);
 665         }
 666
 667         ret = uverbs_response(attrs, &resp, sizeof(resp));
 668         if (ret)
 669                 goto err_copy;
 670
 671         if (f.file)
 672                 fdput(f);
 673
 674         mutex_unlock(&ibudev->xrcd_tree_mutex);
 675
 676         return uobj_alloc_commit(&obj->uobject);
 677
 678 err_copy:
 679         if (inode) {
 680                 if (new_xrcd)
 681                         xrcd_table_delete(ibudev, inode);
 682                 atomic_dec(&xrcd->usecnt);
 683         }
 684
 685 err_dealloc_xrcd:
 686         ib_dealloc_xrcd(xrcd);
 687
 688 err:
 689         uobj_alloc_abort(&obj->uobject);
 690
 691 err_tree_mutex_unlock:
 692         if (f.file)
 693                 fdput(f);
 694
 695         mutex_unlock(&ibudev->xrcd_tree_mutex);
 696
 697         return ret;
 698 }
 699
 700 static int ib_uverbs_close_xrcd(struct uverbs_attr_bundle *attrs)
 701 {
 702         struct ib_uverbs_close_xrcd cmd;
 703         int ret;
 704
 705         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 706         if (ret)
 707                 return ret;
 708
 709         return uobj_perform_destroy(UVERBS_OBJECT_XRCD, cmd.xrcd_handle, attrs);
 710 }
 711
 712 int ib_uverbs_dealloc_xrcd(struct ib_uobject *uobject,
 713                            struct ib_xrcd *xrcd,
 714                            enum rdma_remove_reason why)
 715 {
 716         struct inode *inode;
 717         int ret;
 718         struct ib_uverbs_device *dev = uobject->context->ufile->device;
 719
 720         inode = xrcd->inode;
 721         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 722                 return 0;
 723
 724         ret = ib_dealloc_xrcd(xrcd);
 725
 726         if (ib_is_destroy_retryable(ret, why, uobject)) {
 727                 atomic_inc(&xrcd->usecnt);
 728                 return ret;
 729         }
 730
 731         if (inode)
 732                 xrcd_table_delete(dev, inode);
 733
 734         return ret;
 735 }
 736
 737 static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs)
 738 {
 739         struct ib_uverbs_reg_mr      cmd;
 740         struct ib_uverbs_reg_mr_resp resp;
 741         struct ib_uobject           *uobj;
 742         struct ib_pd                *pd;
 743         struct ib_mr                *mr;
 744         int                          ret;
 745         struct ib_device *ib_dev;
 746
 747         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 748         if (ret)
 749                 return ret;
 750
 751         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 752                 return -EINVAL;
 753
 754         ret = ib_check_mr_access(cmd.access_flags);
 755         if (ret)
 756                 return ret;
 757
 758         uobj = uobj_alloc(UVERBS_OBJECT_MR, attrs, &ib_dev);
 759         if (IS_ERR(uobj))
 760                 return PTR_ERR(uobj);
 761
 762         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 763         if (!pd) {
 764                 ret = -EINVAL;
 765                 goto err_free;
 766         }
 767
 768         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 769                 if (!(pd->device->attrs.device_cap_flags &
 770                       IB_DEVICE_ON_DEMAND_PAGING)) {
 771                         pr_debug("ODP support not available\n");
 772                         ret = -EINVAL;
 773                         goto err_put;
 774                 }
 775         }
 776
 777         mr = pd->device->ops.reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 778                                          cmd.access_flags,
 779                                          &attrs->driver_udata);
 780         if (IS_ERR(mr)) {
 781                 ret = PTR_ERR(mr);
 782                 goto err_put;
 783         }
 784
 785         mr->device  = pd->device;
 786         mr->pd      = pd;
 787         mr->dm      = NULL;
 788         mr->uobject = uobj;
 789         atomic_inc(&pd->usecnt);
 790         mr->res.type = RDMA_RESTRACK_MR;
 791         rdma_restrack_uadd(&mr->res);
 792
 793         uobj->object = mr;
 794
 795         memset(&resp, 0, sizeof resp);
 796         resp.lkey      = mr->lkey;
 797         resp.rkey      = mr->rkey;
 798         resp.mr_handle = uobj->id;
 799
 800         ret = uverbs_response(attrs, &resp, sizeof(resp));
 801         if (ret)
 802                 goto err_copy;
 803
 804         uobj_put_obj_read(pd);
 805
 806         return uobj_alloc_commit(uobj);
 807
 808 err_copy:
 809         ib_dereg_mr(mr);
 810
 811 err_put:
 812         uobj_put_obj_read(pd);
 813
 814 err_free:
 815         uobj_alloc_abort(uobj);
 816         return ret;
 817 }
 818
 819 static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs)
 820 {
 821         struct ib_uverbs_rereg_mr      cmd;
 822         struct ib_uverbs_rereg_mr_resp resp;
 823         struct ib_pd                *pd = NULL;
 824         struct ib_mr                *mr;
 825         struct ib_pd                *old_pd;
 826         int                          ret;
 827         struct ib_uobject           *uobj;
 828
 829         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 830         if (ret)
 831                 return ret;
 832
 833         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 834                 return -EINVAL;
 835
 836         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 837             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 838              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 839                         return -EINVAL;
 840
 841         uobj = uobj_get_write(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 842         if (IS_ERR(uobj))
 843                 return PTR_ERR(uobj);
 844
 845         mr = uobj->object;
 846
 847         if (mr->dm) {
 848                 ret = -EINVAL;
 849                 goto put_uobjs;
 850         }
 851
 852         if (cmd.flags & IB_MR_REREG_ACCESS) {
 853                 ret = ib_check_mr_access(cmd.access_flags);
 854                 if (ret)
 855                         goto put_uobjs;
 856         }
 857
 858         if (cmd.flags & IB_MR_REREG_PD) {
 859                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle,
 860                                        attrs);
 861                 if (!pd) {
 862                         ret = -EINVAL;
 863                         goto put_uobjs;
 864                 }
 865         }
 866
 867         old_pd = mr->pd;
 868         ret = mr->device->ops.rereg_user_mr(mr, cmd.flags, cmd.start,
 869                                             cmd.length, cmd.hca_va,
 870                                             cmd.access_flags, pd,
 871                                             &attrs->driver_udata);
 872         if (!ret) {
 873                 if (cmd.flags & IB_MR_REREG_PD) {
 874                         atomic_inc(&pd->usecnt);
 875                         mr->pd = pd;
 876                         atomic_dec(&old_pd->usecnt);
 877                 }
 878         } else {
 879                 goto put_uobj_pd;
 880         }
 881
 882         memset(&resp, 0, sizeof(resp));
 883         resp.lkey      = mr->lkey;
 884         resp.rkey      = mr->rkey;
 885
 886         ret = uverbs_response(attrs, &resp, sizeof(resp));
 887
 888 put_uobj_pd:
 889         if (cmd.flags & IB_MR_REREG_PD)
 890                 uobj_put_obj_read(pd);
 891
 892 put_uobjs:
 893         uobj_put_write(uobj);
 894
 895         return ret;
 896 }
 897
 898 static int ib_uverbs_dereg_mr(struct uverbs_attr_bundle *attrs)
 899 {
 900         struct ib_uverbs_dereg_mr cmd;
 901         int ret;
 902
 903         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 904         if (ret)
 905                 return ret;
 906
 907         return uobj_perform_destroy(UVERBS_OBJECT_MR, cmd.mr_handle, attrs);
 908 }
 909
 910 static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs)
 911 {
 912         struct ib_uverbs_alloc_mw      cmd;
 913         struct ib_uverbs_alloc_mw_resp resp;
 914         struct ib_uobject             *uobj;
 915         struct ib_pd                  *pd;
 916         struct ib_mw                  *mw;
 917         int                            ret;
 918         struct ib_device *ib_dev;
 919
 920         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 921         if (ret)
 922                 return ret;
 923
 924         uobj = uobj_alloc(UVERBS_OBJECT_MW, attrs, &ib_dev);
 925         if (IS_ERR(uobj))
 926                 return PTR_ERR(uobj);
 927
 928         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
 929         if (!pd) {
 930                 ret = -EINVAL;
 931                 goto err_free;
 932         }
 933
 934         mw = pd->device->ops.alloc_mw(pd, cmd.mw_type, &attrs->driver_udata);
 935         if (IS_ERR(mw)) {
 936                 ret = PTR_ERR(mw);
 937                 goto err_put;
 938         }
 939
 940         mw->device  = pd->device;
 941         mw->pd      = pd;
 942         mw->uobject = uobj;
 943         atomic_inc(&pd->usecnt);
 944
 945         uobj->object = mw;
 946
 947         memset(&resp, 0, sizeof(resp));
 948         resp.rkey      = mw->rkey;
 949         resp.mw_handle = uobj->id;
 950
 951         ret = uverbs_response(attrs, &resp, sizeof(resp));
 952         if (ret)
 953                 goto err_copy;
 954
 955         uobj_put_obj_read(pd);
 956         return uobj_alloc_commit(uobj);
 957
 958 err_copy:
 959         uverbs_dealloc_mw(mw);
 960 err_put:
 961         uobj_put_obj_read(pd);
 962 err_free:
 963         uobj_alloc_abort(uobj);
 964         return ret;
 965 }
 966
 967 static int ib_uverbs_dealloc_mw(struct uverbs_attr_bundle *attrs)
 968 {
 969         struct ib_uverbs_dealloc_mw cmd;
 970         int ret;
 971
 972         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 973         if (ret)
 974                 return ret;
 975
 976         return uobj_perform_destroy(UVERBS_OBJECT_MW, cmd.mw_handle, attrs);
 977 }
 978
 979 static int ib_uverbs_create_comp_channel(struct uverbs_attr_bundle *attrs)
 980 {
 981         struct ib_uverbs_create_comp_channel       cmd;
 982         struct ib_uverbs_create_comp_channel_resp  resp;
 983         struct ib_uobject                         *uobj;
 984         struct ib_uverbs_completion_event_file    *ev_file;
 985         struct ib_device *ib_dev;
 986         int ret;
 987
 988         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
 989         if (ret)
 990                 return ret;
 991
 992         uobj = uobj_alloc(UVERBS_OBJECT_COMP_CHANNEL, attrs, &ib_dev);
 993         if (IS_ERR(uobj))
 994                 return PTR_ERR(uobj);
 995
 996         resp.fd = uobj->id;
 997
 998         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 999                                uobj);
1000         ib_uverbs_init_event_queue(&ev_file->ev_queue);
1001
1002         ret = uverbs_response(attrs, &resp, sizeof(resp));
1003         if (ret) {
1004                 uobj_alloc_abort(uobj);
1005                 return ret;
1006         }
1007
1008         return uobj_alloc_commit(uobj);
1009 }
1010
1011 static struct ib_ucq_object *create_cq(struct uverbs_attr_bundle *attrs,
1012                                        struct ib_uverbs_ex_create_cq *cmd)
1013 {
1014         struct ib_ucq_object           *obj;
1015         struct ib_uverbs_completion_event_file    *ev_file = NULL;
1016         struct ib_cq                   *cq;
1017         int                             ret;
1018         struct ib_uverbs_ex_create_cq_resp resp;
1019         struct ib_cq_init_attr attr = {};
1020         struct ib_device *ib_dev;
1021
1022         if (cmd->comp_vector >= attrs->ufile->device->num_comp_vectors)
1023                 return ERR_PTR(-EINVAL);
1024
1025         obj = (struct ib_ucq_object *)uobj_alloc(UVERBS_OBJECT_CQ, attrs,
1026                                                  &ib_dev);
1027         if (IS_ERR(obj))
1028                 return obj;
1029
1030         if (cmd->comp_channel >= 0) {
1031                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel, attrs);
1032                 if (IS_ERR(ev_file)) {
1033                         ret = PTR_ERR(ev_file);
1034                         goto err;
1035                 }
1036         }
1037
1038         obj->uobject.user_handle = cmd->user_handle;
1039         obj->comp_events_reported  = 0;
1040         obj->async_events_reported = 0;
1041         INIT_LIST_HEAD(&obj->comp_list);
1042         INIT_LIST_HEAD(&obj->async_list);
1043
1044         attr.cqe = cmd->cqe;
1045         attr.comp_vector = cmd->comp_vector;
1046         attr.flags = cmd->flags;
1047
1048         cq = ib_dev->ops.create_cq(ib_dev, &attr, obj->uobject.context,
1049                                    &attrs->driver_udata);
1050         if (IS_ERR(cq)) {
1051                 ret = PTR_ERR(cq);
1052                 goto err_file;
1053         }
1054
1055         cq->device        = ib_dev;
1056         cq->uobject       = &obj->uobject;
1057         cq->comp_handler  = ib_uverbs_comp_handler;
1058         cq->event_handler = ib_uverbs_cq_event_handler;
1059         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1060         atomic_set(&cq->usecnt, 0);
1061
1062         obj->uobject.object = cq;
1063         memset(&resp, 0, sizeof resp);
1064         resp.base.cq_handle = obj->uobject.id;
1065         resp.base.cqe       = cq->cqe;
1066         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1067
1068         cq->res.type = RDMA_RESTRACK_CQ;
1069         rdma_restrack_uadd(&cq->res);
1070
1071         ret = uverbs_response(attrs, &resp, sizeof(resp));
1072         if (ret)
1073                 goto err_cb;
1074
1075         ret = uobj_alloc_commit(&obj->uobject);
1076         if (ret)
1077                 return ERR_PTR(ret);
1078         return obj;
1079
1080 err_cb:
1081         ib_destroy_cq(cq);
1082
1083 err_file:
1084         if (ev_file)
1085                 ib_uverbs_release_ucq(attrs->ufile, ev_file, obj);
1086
1087 err:
1088         uobj_alloc_abort(&obj->uobject);
1089
1090         return ERR_PTR(ret);
1091 }
1092
1093 static int ib_uverbs_create_cq(struct uverbs_attr_bundle *attrs)
1094 {
1095         struct ib_uverbs_create_cq      cmd;
1096         struct ib_uverbs_ex_create_cq   cmd_ex;
1097         struct ib_ucq_object           *obj;
1098         int ret;
1099
1100         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1101         if (ret)
1102                 return ret;
1103
1104         memset(&cmd_ex, 0, sizeof(cmd_ex));
1105         cmd_ex.user_handle = cmd.user_handle;
1106         cmd_ex.cqe = cmd.cqe;
1107         cmd_ex.comp_vector = cmd.comp_vector;
1108         cmd_ex.comp_channel = cmd.comp_channel;
1109
1110         obj = create_cq(attrs, &cmd_ex);
1111         return PTR_ERR_OR_ZERO(obj);
1112 }
1113
1114 static int ib_uverbs_ex_create_cq(struct uverbs_attr_bundle *attrs)
1115 {
1116         struct ib_uverbs_ex_create_cq  cmd;
1117         struct ib_ucq_object           *obj;
1118         int ret;
1119
1120         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1121         if (ret)
1122                 return ret;
1123
1124         if (cmd.comp_mask)
1125                 return -EINVAL;
1126
1127         if (cmd.reserved)
1128                 return -EINVAL;
1129
1130         obj = create_cq(attrs, &cmd);
1131         return PTR_ERR_OR_ZERO(obj);
1132 }
1133
1134 static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs)
1135 {
1136         struct ib_uverbs_resize_cq      cmd;
1137         struct ib_uverbs_resize_cq_resp resp = {};
1138         struct ib_cq                    *cq;
1139         int                             ret = -EINVAL;
1140
1141         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1142         if (ret)
1143                 return ret;
1144
1145         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1146         if (!cq)
1147                 return -EINVAL;
1148
1149         ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata);
1150         if (ret)
1151                 goto out;
1152
1153         resp.cqe = cq->cqe;
1154
1155         ret = uverbs_response(attrs, &resp, sizeof(resp));
1156 out:
1157         uobj_put_obj_read(cq);
1158
1159         return ret;
1160 }
1161
1162 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1163                            struct ib_wc *wc)
1164 {
1165         struct ib_uverbs_wc tmp;
1166
1167         tmp.wr_id               = wc->wr_id;
1168         tmp.status              = wc->status;
1169         tmp.opcode              = wc->opcode;
1170         tmp.vendor_err          = wc->vendor_err;
1171         tmp.byte_len            = wc->byte_len;
1172         tmp.ex.imm_data         = wc->ex.imm_data;
1173         tmp.qp_num              = wc->qp->qp_num;
1174         tmp.src_qp              = wc->src_qp;
1175         tmp.wc_flags            = wc->wc_flags;
1176         tmp.pkey_index          = wc->pkey_index;
1177         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1178                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1179         else
1180                 tmp.slid        = ib_lid_cpu16(wc->slid);
1181         tmp.sl                  = wc->sl;
1182         tmp.dlid_path_bits      = wc->dlid_path_bits;
1183         tmp.port_num            = wc->port_num;
1184         tmp.reserved            = 0;
1185
1186         if (copy_to_user(dest, &tmp, sizeof tmp))
1187                 return -EFAULT;
1188
1189         return 0;
1190 }
1191
1192 static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs)
1193 {
1194         struct ib_uverbs_poll_cq       cmd;
1195         struct ib_uverbs_poll_cq_resp  resp;
1196         u8 __user                     *header_ptr;
1197         u8 __user                     *data_ptr;
1198         struct ib_cq                  *cq;
1199         struct ib_wc                   wc;
1200         int                            ret;
1201
1202         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1203         if (ret)
1204                 return ret;
1205
1206         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1207         if (!cq)
1208                 return -EINVAL;
1209
1210         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1211         header_ptr = attrs->ucore.outbuf;
1212         data_ptr = header_ptr + sizeof resp;
1213
1214         memset(&resp, 0, sizeof resp);
1215         while (resp.count < cmd.ne) {
1216                 ret = ib_poll_cq(cq, 1, &wc);
1217                 if (ret < 0)
1218                         goto out_put;
1219                 if (!ret)
1220                         break;
1221
1222                 ret = copy_wc_to_user(cq->device, data_ptr, &wc);
1223                 if (ret)
1224                         goto out_put;
1225
1226                 data_ptr += sizeof(struct ib_uverbs_wc);
1227                 ++resp.count;
1228         }
1229
1230         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1231                 ret = -EFAULT;
1232                 goto out_put;
1233         }
1234
1235         ret = 0;
1236
1237 out_put:
1238         uobj_put_obj_read(cq);
1239         return ret;
1240 }
1241
1242 static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs)
1243 {
1244         struct ib_uverbs_req_notify_cq cmd;
1245         struct ib_cq                  *cq;
1246         int ret;
1247
1248         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1249         if (ret)
1250                 return ret;
1251
1252         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1253         if (!cq)
1254                 return -EINVAL;
1255
1256         ib_req_notify_cq(cq, cmd.solicited_only ?
1257                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1258
1259         uobj_put_obj_read(cq);
1260
1261         return 0;
1262 }
1263
1264 static int ib_uverbs_destroy_cq(struct uverbs_attr_bundle *attrs)
1265 {
1266         struct ib_uverbs_destroy_cq      cmd;
1267         struct ib_uverbs_destroy_cq_resp resp;
1268         struct ib_uobject               *uobj;
1269         struct ib_ucq_object            *obj;
1270         int ret;
1271
1272         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1273         if (ret)
1274                 return ret;
1275
1276         uobj = uobj_get_destroy(UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
1277         if (IS_ERR(uobj))
1278                 return PTR_ERR(uobj);
1279
1280         obj = container_of(uobj, struct ib_ucq_object, uobject);
1281         memset(&resp, 0, sizeof(resp));
1282         resp.comp_events_reported  = obj->comp_events_reported;
1283         resp.async_events_reported = obj->async_events_reported;
1284
1285         uobj_put_destroy(uobj);
1286
1287         return uverbs_response(attrs, &resp, sizeof(resp));
1288 }
1289
1290 static int create_qp(struct uverbs_attr_bundle *attrs,
1291                      struct ib_uverbs_ex_create_qp *cmd)
1292 {
1293         struct ib_uqp_object            *obj;
1294         struct ib_device                *device;
1295         struct ib_pd                    *pd = NULL;
1296         struct ib_xrcd                  *xrcd = NULL;
1297         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1298         struct ib_cq                    *scq = NULL, *rcq = NULL;
1299         struct ib_srq                   *srq = NULL;
1300         struct ib_qp                    *qp;
1301         struct ib_qp_init_attr          attr = {};
1302         struct ib_uverbs_ex_create_qp_resp resp;
1303         int                             ret;
1304         struct ib_rwq_ind_table *ind_tbl = NULL;
1305         bool has_sq = true;
1306         struct ib_device *ib_dev;
1307
1308         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1309                 return -EPERM;
1310
1311         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1312                                                  &ib_dev);
1313         if (IS_ERR(obj))
1314                 return PTR_ERR(obj);
1315         obj->uxrcd = NULL;
1316         obj->uevent.uobject.user_handle = cmd->user_handle;
1317         mutex_init(&obj->mcast_lock);
1318
1319         if (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE) {
1320                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1321                                             UVERBS_OBJECT_RWQ_IND_TBL,
1322                                             cmd->rwq_ind_tbl_handle, attrs);
1323                 if (!ind_tbl) {
1324                         ret = -EINVAL;
1325                         goto err_put;
1326                 }
1327
1328                 attr.rwq_ind_tbl = ind_tbl;
1329         }
1330
1331         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1332                 ret = -EINVAL;
1333                 goto err_put;
1334         }
1335
1336         if (ind_tbl && !cmd->max_send_wr)
1337                 has_sq = false;
1338
1339         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1340                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->pd_handle,
1341                                           attrs);
1342
1343                 if (IS_ERR(xrcd_uobj)) {
1344                         ret = -EINVAL;
1345                         goto err_put;
1346                 }
1347
1348                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1349                 if (!xrcd) {
1350                         ret = -EINVAL;
1351                         goto err_put;
1352                 }
1353                 device = xrcd->device;
1354         } else {
1355                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1356                         cmd->max_recv_wr = 0;
1357                         cmd->max_recv_sge = 0;
1358                 } else {
1359                         if (cmd->is_srq) {
1360                                 srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ,
1361                                                         cmd->srq_handle, attrs);
1362                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1363                                         ret = -EINVAL;
1364                                         goto err_put;
1365                                 }
1366                         }
1367
1368                         if (!ind_tbl) {
1369                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1370                                         rcq = uobj_get_obj_read(
1371                                                 cq, UVERBS_OBJECT_CQ,
1372                                                 cmd->recv_cq_handle, attrs);
1373                                         if (!rcq) {
1374                                                 ret = -EINVAL;
1375                                                 goto err_put;
1376                                         }
1377                                 }
1378                         }
1379                 }
1380
1381                 if (has_sq)
1382                         scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
1383                                                 cmd->send_cq_handle, attrs);
1384                 if (!ind_tbl)
1385                         rcq = rcq ?: scq;
1386                 pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle,
1387                                        attrs);
1388                 if (!pd || (!scq && has_sq)) {
1389                         ret = -EINVAL;
1390                         goto err_put;
1391                 }
1392
1393                 device = pd->device;
1394         }
1395
1396         attr.event_handler = ib_uverbs_qp_event_handler;
1397         attr.qp_context    = attrs->ufile;
1398         attr.send_cq       = scq;
1399         attr.recv_cq       = rcq;
1400         attr.srq           = srq;
1401         attr.xrcd          = xrcd;
1402         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1403                                               IB_SIGNAL_REQ_WR;
1404         attr.qp_type       = cmd->qp_type;
1405         attr.create_flags  = 0;
1406
1407         attr.cap.max_send_wr     = cmd->max_send_wr;
1408         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1409         attr.cap.max_send_sge    = cmd->max_send_sge;
1410         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1411         attr.cap.max_inline_data = cmd->max_inline_data;
1412
1413         obj->uevent.events_reported     = 0;
1414         INIT_LIST_HEAD(&obj->uevent.event_list);
1415         INIT_LIST_HEAD(&obj->mcast_list);
1416
1417         attr.create_flags = cmd->create_flags;
1418         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1419                                 IB_QP_CREATE_CROSS_CHANNEL |
1420                                 IB_QP_CREATE_MANAGED_SEND |
1421                                 IB_QP_CREATE_MANAGED_RECV |
1422                                 IB_QP_CREATE_SCATTER_FCS |
1423                                 IB_QP_CREATE_CVLAN_STRIPPING |
1424                                 IB_QP_CREATE_SOURCE_QPN |
1425                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1426                 ret = -EINVAL;
1427                 goto err_put;
1428         }
1429
1430         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1431                 if (!capable(CAP_NET_RAW)) {
1432                         ret = -EPERM;
1433                         goto err_put;
1434                 }
1435
1436                 attr.source_qpn = cmd->source_qpn;
1437         }
1438
1439         if (cmd->qp_type == IB_QPT_XRC_TGT)
1440                 qp = ib_create_qp(pd, &attr);
1441         else
1442                 qp = _ib_create_qp(device, pd, &attr, &attrs->driver_udata,
1443                                    &obj->uevent.uobject);
1444
1445         if (IS_ERR(qp)) {
1446                 ret = PTR_ERR(qp);
1447                 goto err_put;
1448         }
1449
1450         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1451                 ret = ib_create_qp_security(qp, device);
1452                 if (ret)
1453                         goto err_cb;
1454
1455                 qp->real_qp       = qp;
1456                 qp->pd            = pd;
1457                 qp->send_cq       = attr.send_cq;
1458                 qp->recv_cq       = attr.recv_cq;
1459                 qp->srq           = attr.srq;
1460                 qp->rwq_ind_tbl   = ind_tbl;
1461                 qp->event_handler = attr.event_handler;
1462                 qp->qp_context    = attr.qp_context;
1463                 qp->qp_type       = attr.qp_type;
1464                 atomic_set(&qp->usecnt, 0);
1465                 atomic_inc(&pd->usecnt);
1466                 qp->port = 0;
1467                 if (attr.send_cq)
1468                         atomic_inc(&attr.send_cq->usecnt);
1469                 if (attr.recv_cq)
1470                         atomic_inc(&attr.recv_cq->usecnt);
1471                 if (attr.srq)
1472                         atomic_inc(&attr.srq->usecnt);
1473                 if (ind_tbl)
1474                         atomic_inc(&ind_tbl->usecnt);
1475         } else {
1476                 /* It is done in _ib_create_qp for other QP types */
1477                 qp->uobject = &obj->uevent.uobject;
1478         }
1479
1480         obj->uevent.uobject.object = qp;
1481
1482         memset(&resp, 0, sizeof resp);
1483         resp.base.qpn             = qp->qp_num;
1484         resp.base.qp_handle       = obj->uevent.uobject.id;
1485         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1486         resp.base.max_send_sge    = attr.cap.max_send_sge;
1487         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1488         resp.base.max_send_wr     = attr.cap.max_send_wr;
1489         resp.base.max_inline_data = attr.cap.max_inline_data;
1490         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
1491
1492         ret = uverbs_response(attrs, &resp, sizeof(resp));
1493         if (ret)
1494                 goto err_cb;
1495
1496         if (xrcd) {
1497                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1498                                           uobject);
1499                 atomic_inc(&obj->uxrcd->refcnt);
1500                 uobj_put_read(xrcd_uobj);
1501         }
1502
1503         if (pd)
1504                 uobj_put_obj_read(pd);
1505         if (scq)
1506                 uobj_put_obj_read(scq);
1507         if (rcq && rcq != scq)
1508                 uobj_put_obj_read(rcq);
1509         if (srq)
1510                 uobj_put_obj_read(srq);
1511         if (ind_tbl)
1512                 uobj_put_obj_read(ind_tbl);
1513
1514         return uobj_alloc_commit(&obj->uevent.uobject);
1515 err_cb:
1516         ib_destroy_qp(qp);
1517
1518 err_put:
1519         if (!IS_ERR(xrcd_uobj))
1520                 uobj_put_read(xrcd_uobj);
1521         if (pd)
1522                 uobj_put_obj_read(pd);
1523         if (scq)
1524                 uobj_put_obj_read(scq);
1525         if (rcq && rcq != scq)
1526                 uobj_put_obj_read(rcq);
1527         if (srq)
1528                 uobj_put_obj_read(srq);
1529         if (ind_tbl)
1530                 uobj_put_obj_read(ind_tbl);
1531
1532         uobj_alloc_abort(&obj->uevent.uobject);
1533         return ret;
1534 }
1535
1536 static int ib_uverbs_create_qp(struct uverbs_attr_bundle *attrs)
1537 {
1538         struct ib_uverbs_create_qp      cmd;
1539         struct ib_uverbs_ex_create_qp   cmd_ex;
1540         int ret;
1541
1542         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1543         if (ret)
1544                 return ret;
1545
1546         memset(&cmd_ex, 0, sizeof(cmd_ex));
1547         cmd_ex.user_handle = cmd.user_handle;
1548         cmd_ex.pd_handle = cmd.pd_handle;
1549         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1550         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1551         cmd_ex.srq_handle = cmd.srq_handle;
1552         cmd_ex.max_send_wr = cmd.max_send_wr;
1553         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1554         cmd_ex.max_send_sge = cmd.max_send_sge;
1555         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1556         cmd_ex.max_inline_data = cmd.max_inline_data;
1557         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1558         cmd_ex.qp_type = cmd.qp_type;
1559         cmd_ex.is_srq = cmd.is_srq;
1560
1561         return create_qp(attrs, &cmd_ex);
1562 }
1563
1564 static int ib_uverbs_ex_create_qp(struct uverbs_attr_bundle *attrs)
1565 {
1566         struct ib_uverbs_ex_create_qp cmd;
1567         int ret;
1568
1569         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1570         if (ret)
1571                 return ret;
1572
1573         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1574                 return -EINVAL;
1575
1576         if (cmd.reserved)
1577                 return -EINVAL;
1578
1579         return create_qp(attrs, &cmd);
1580 }
1581
1582 static int ib_uverbs_open_qp(struct uverbs_attr_bundle *attrs)
1583 {
1584         struct ib_uverbs_open_qp        cmd;
1585         struct ib_uverbs_create_qp_resp resp;
1586         struct ib_uqp_object           *obj;
1587         struct ib_xrcd                 *xrcd;
1588         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1589         struct ib_qp                   *qp;
1590         struct ib_qp_open_attr          attr;
1591         int ret;
1592         struct ib_device *ib_dev;
1593
1594         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1595         if (ret)
1596                 return ret;
1597
1598         obj = (struct ib_uqp_object *)uobj_alloc(UVERBS_OBJECT_QP, attrs,
1599                                                  &ib_dev);
1600         if (IS_ERR(obj))
1601                 return PTR_ERR(obj);
1602
1603         xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd.pd_handle, attrs);
1604         if (IS_ERR(xrcd_uobj)) {
1605                 ret = -EINVAL;
1606                 goto err_put;
1607         }
1608
1609         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1610         if (!xrcd) {
1611                 ret = -EINVAL;
1612                 goto err_xrcd;
1613         }
1614
1615         attr.event_handler = ib_uverbs_qp_event_handler;
1616         attr.qp_context    = attrs->ufile;
1617         attr.qp_num        = cmd.qpn;
1618         attr.qp_type       = cmd.qp_type;
1619
1620         obj->uevent.events_reported = 0;
1621         INIT_LIST_HEAD(&obj->uevent.event_list);
1622         INIT_LIST_HEAD(&obj->mcast_list);
1623
1624         qp = ib_open_qp(xrcd, &attr);
1625         if (IS_ERR(qp)) {
1626                 ret = PTR_ERR(qp);
1627                 goto err_xrcd;
1628         }
1629
1630         obj->uevent.uobject.object = qp;
1631         obj->uevent.uobject.user_handle = cmd.user_handle;
1632
1633         memset(&resp, 0, sizeof resp);
1634         resp.qpn       = qp->qp_num;
1635         resp.qp_handle = obj->uevent.uobject.id;
1636
1637         ret = uverbs_response(attrs, &resp, sizeof(resp));
1638         if (ret)
1639                 goto err_destroy;
1640
1641         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1642         atomic_inc(&obj->uxrcd->refcnt);
1643         qp->uobject = &obj->uevent.uobject;
1644         uobj_put_read(xrcd_uobj);
1645
1646         return uobj_alloc_commit(&obj->uevent.uobject);
1647
1648 err_destroy:
1649         ib_destroy_qp(qp);
1650 err_xrcd:
1651         uobj_put_read(xrcd_uobj);
1652 err_put:
1653         uobj_alloc_abort(&obj->uevent.uobject);
1654         return ret;
1655 }
1656
1657 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1658                                    struct rdma_ah_attr *rdma_attr)
1659 {
1660         const struct ib_global_route   *grh;
1661
1662         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1663         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1664         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1665         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1666         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1667                                          IB_AH_GRH);
1668         if (uverb_attr->is_global) {
1669                 grh = rdma_ah_read_grh(rdma_attr);
1670                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1671                 uverb_attr->flow_label        = grh->flow_label;
1672                 uverb_attr->sgid_index        = grh->sgid_index;
1673                 uverb_attr->hop_limit         = grh->hop_limit;
1674                 uverb_attr->traffic_class     = grh->traffic_class;
1675         }
1676         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1677 }
1678
1679 static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs)
1680 {
1681         struct ib_uverbs_query_qp      cmd;
1682         struct ib_uverbs_query_qp_resp resp;
1683         struct ib_qp                   *qp;
1684         struct ib_qp_attr              *attr;
1685         struct ib_qp_init_attr         *init_attr;
1686         int                            ret;
1687
1688         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1689         if (ret)
1690                 return ret;
1691
1692         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1693         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1694         if (!attr || !init_attr) {
1695                 ret = -ENOMEM;
1696                 goto out;
1697         }
1698
1699         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
1700         if (!qp) {
1701                 ret = -EINVAL;
1702                 goto out;
1703         }
1704
1705         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1706
1707         uobj_put_obj_read(qp);
1708
1709         if (ret)
1710                 goto out;
1711
1712         memset(&resp, 0, sizeof resp);
1713
1714         resp.qp_state               = attr->qp_state;
1715         resp.cur_qp_state           = attr->cur_qp_state;
1716         resp.path_mtu               = attr->path_mtu;
1717         resp.path_mig_state         = attr->path_mig_state;
1718         resp.qkey                   = attr->qkey;
1719         resp.rq_psn                 = attr->rq_psn;
1720         resp.sq_psn                 = attr->sq_psn;
1721         resp.dest_qp_num            = attr->dest_qp_num;
1722         resp.qp_access_flags        = attr->qp_access_flags;
1723         resp.pkey_index             = attr->pkey_index;
1724         resp.alt_pkey_index         = attr->alt_pkey_index;
1725         resp.sq_draining            = attr->sq_draining;
1726         resp.max_rd_atomic          = attr->max_rd_atomic;
1727         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1728         resp.min_rnr_timer          = attr->min_rnr_timer;
1729         resp.port_num               = attr->port_num;
1730         resp.timeout                = attr->timeout;
1731         resp.retry_cnt              = attr->retry_cnt;
1732         resp.rnr_retry              = attr->rnr_retry;
1733         resp.alt_port_num           = attr->alt_port_num;
1734         resp.alt_timeout            = attr->alt_timeout;
1735
1736         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1737         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1738
1739         resp.max_send_wr            = init_attr->cap.max_send_wr;
1740         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1741         resp.max_send_sge           = init_attr->cap.max_send_sge;
1742         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1743         resp.max_inline_data        = init_attr->cap.max_inline_data;
1744         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1745
1746         ret = uverbs_response(attrs, &resp, sizeof(resp));
1747
1748 out:
1749         kfree(attr);
1750         kfree(init_attr);
1751
1752         return ret;
1753 }
1754
1755 /* Remove ignored fields set in the attribute mask */
1756 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1757 {
1758         switch (qp_type) {
1759         case IB_QPT_XRC_INI:
1760                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1761         case IB_QPT_XRC_TGT:
1762                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1763                                 IB_QP_RNR_RETRY);
1764         default:
1765                 return mask;
1766         }
1767 }
1768
1769 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1770                                      struct rdma_ah_attr *rdma_attr,
1771                                      struct ib_uverbs_qp_dest *uverb_attr)
1772 {
1773         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1774         if (uverb_attr->is_global) {
1775                 rdma_ah_set_grh(rdma_attr, NULL,
1776                                 uverb_attr->flow_label,
1777                                 uverb_attr->sgid_index,
1778                                 uverb_attr->hop_limit,
1779                                 uverb_attr->traffic_class);
1780                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1781         } else {
1782                 rdma_ah_set_ah_flags(rdma_attr, 0);
1783         }
1784         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1785         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1786         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1787         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1788         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1789         rdma_ah_set_make_grd(rdma_attr, false);
1790 }
1791
1792 static int modify_qp(struct uverbs_attr_bundle *attrs,
1793                      struct ib_uverbs_ex_modify_qp *cmd)
1794 {
1795         struct ib_qp_attr *attr;
1796         struct ib_qp *qp;
1797         int ret;
1798
1799         attr = kzalloc(sizeof(*attr), GFP_KERNEL);
1800         if (!attr)
1801                 return -ENOMEM;
1802
1803         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle,
1804                                attrs);
1805         if (!qp) {
1806                 ret = -EINVAL;
1807                 goto out;
1808         }
1809
1810         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1811             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1812                 ret = -EINVAL;
1813                 goto release_qp;
1814         }
1815
1816         if ((cmd->base.attr_mask & IB_QP_AV)) {
1817                 if (!rdma_is_port_valid(qp->device, cmd->base.dest.port_num)) {
1818                         ret = -EINVAL;
1819                         goto release_qp;
1820                 }
1821
1822                 if (cmd->base.attr_mask & IB_QP_STATE &&
1823                     cmd->base.qp_state == IB_QPS_RTR) {
1824                 /* We are in INIT->RTR TRANSITION (if we are not,
1825                  * this transition will be rejected in subsequent checks).
1826                  * In the INIT->RTR transition, we cannot have IB_QP_PORT set,
1827                  * but the IB_QP_STATE flag is required.
1828                  *
1829                  * Since kernel 3.14 (commit dbf727de7440), the uverbs driver,
1830                  * when IB_QP_AV is set, has required inclusion of a valid
1831                  * port number in the primary AV. (AVs are created and handled
1832                  * differently for infiniband and ethernet (RoCE) ports).
1833                  *
1834                  * Check the port number included in the primary AV against
1835                  * the port number in the qp struct, which was set (and saved)
1836                  * in the RST->INIT transition.
1837                  */
1838                         if (cmd->base.dest.port_num != qp->real_qp->port) {
1839                                 ret = -EINVAL;
1840                                 goto release_qp;
1841                         }
1842                 } else {
1843                 /* We are in SQD->SQD. (If we are not, this transition will
1844                  * be rejected later in the verbs layer checks).
1845                  * Check for both IB_QP_PORT and IB_QP_AV, these can be set
1846                  * together in the SQD->SQD transition.
1847                  *
1848                  * If only IP_QP_AV was set, add in IB_QP_PORT as well (the
1849                  * verbs layer driver does not track primary port changes
1850                  * resulting from path migration. Thus, in SQD, if the primary
1851                  * AV is modified, the primary port should also be modified).
1852                  *
1853                  * Note that in this transition, the IB_QP_STATE flag
1854                  * is not allowed.
1855                  */
1856                         if (((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1857                              == (IB_QP_AV | IB_QP_PORT)) &&
1858                             cmd->base.port_num != cmd->base.dest.port_num) {
1859                                 ret = -EINVAL;
1860                                 goto release_qp;
1861                         }
1862                         if ((cmd->base.attr_mask & (IB_QP_AV | IB_QP_PORT))
1863                             == IB_QP_AV) {
1864                                 cmd->base.attr_mask |= IB_QP_PORT;
1865                                 cmd->base.port_num = cmd->base.dest.port_num;
1866                         }
1867                 }
1868         }
1869
1870         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1871             (!rdma_is_port_valid(qp->device, cmd->base.alt_port_num) ||
1872             !rdma_is_port_valid(qp->device, cmd->base.alt_dest.port_num) ||
1873             cmd->base.alt_port_num != cmd->base.alt_dest.port_num)) {
1874                 ret = -EINVAL;
1875                 goto release_qp;
1876         }
1877
1878         if ((cmd->base.attr_mask & IB_QP_CUR_STATE &&
1879             cmd->base.cur_qp_state > IB_QPS_ERR) ||
1880             (cmd->base.attr_mask & IB_QP_STATE &&
1881             cmd->base.qp_state > IB_QPS_ERR)) {
1882                 ret = -EINVAL;
1883                 goto release_qp;
1884         }
1885
1886         if (cmd->base.attr_mask & IB_QP_STATE)
1887                 attr->qp_state = cmd->base.qp_state;
1888         if (cmd->base.attr_mask & IB_QP_CUR_STATE)
1889                 attr->cur_qp_state = cmd->base.cur_qp_state;
1890         if (cmd->base.attr_mask & IB_QP_PATH_MTU)
1891                 attr->path_mtu = cmd->base.path_mtu;
1892         if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
1893                 attr->path_mig_state = cmd->base.path_mig_state;
1894         if (cmd->base.attr_mask & IB_QP_QKEY)
1895                 attr->qkey = cmd->base.qkey;
1896         if (cmd->base.attr_mask & IB_QP_RQ_PSN)
1897                 attr->rq_psn = cmd->base.rq_psn;
1898         if (cmd->base.attr_mask & IB_QP_SQ_PSN)
1899                 attr->sq_psn = cmd->base.sq_psn;
1900         if (cmd->base.attr_mask & IB_QP_DEST_QPN)
1901                 attr->dest_qp_num = cmd->base.dest_qp_num;
1902         if (cmd->base.attr_mask & IB_QP_ACCESS_FLAGS)
1903                 attr->qp_access_flags = cmd->base.qp_access_flags;
1904         if (cmd->base.attr_mask & IB_QP_PKEY_INDEX)
1905                 attr->pkey_index = cmd->base.pkey_index;
1906         if (cmd->base.attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
1907                 attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1908         if (cmd->base.attr_mask & IB_QP_MAX_QP_RD_ATOMIC)
1909                 attr->max_rd_atomic = cmd->base.max_rd_atomic;
1910         if (cmd->base.attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
1911                 attr->max_dest_rd_atomic = cmd->base.max_dest_rd_atomic;
1912         if (cmd->base.attr_mask & IB_QP_MIN_RNR_TIMER)
1913                 attr->min_rnr_timer = cmd->base.min_rnr_timer;
1914         if (cmd->base.attr_mask & IB_QP_PORT)
1915                 attr->port_num = cmd->base.port_num;
1916         if (cmd->base.attr_mask & IB_QP_TIMEOUT)
1917                 attr->timeout = cmd->base.timeout;
1918         if (cmd->base.attr_mask & IB_QP_RETRY_CNT)
1919                 attr->retry_cnt = cmd->base.retry_cnt;
1920         if (cmd->base.attr_mask & IB_QP_RNR_RETRY)
1921                 attr->rnr_retry = cmd->base.rnr_retry;
1922         if (cmd->base.attr_mask & IB_QP_ALT_PATH) {
1923                 attr->alt_port_num = cmd->base.alt_port_num;
1924                 attr->alt_timeout = cmd->base.alt_timeout;
1925                 attr->alt_pkey_index = cmd->base.alt_pkey_index;
1926         }
1927         if (cmd->base.attr_mask & IB_QP_RATE_LIMIT)
1928                 attr->rate_limit = cmd->rate_limit;
1929
1930         if (cmd->base.attr_mask & IB_QP_AV)
1931                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
1932                                          &cmd->base.dest);
1933
1934         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
1935                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
1936                                          &cmd->base.alt_dest);
1937
1938         ret = ib_modify_qp_with_udata(qp, attr,
1939                                       modify_qp_mask(qp->qp_type,
1940                                                      cmd->base.attr_mask),
1941                                       &attrs->driver_udata);
1942
1943 release_qp:
1944         uobj_put_obj_read(qp);
1945 out:
1946         kfree(attr);
1947
1948         return ret;
1949 }
1950
1951 static int ib_uverbs_modify_qp(struct uverbs_attr_bundle *attrs)
1952 {
1953         struct ib_uverbs_ex_modify_qp cmd;
1954         int ret;
1955
1956         ret = uverbs_request(attrs, &cmd.base, sizeof(cmd.base));
1957         if (ret)
1958                 return ret;
1959
1960         if (cmd.base.attr_mask &
1961             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
1962                 return -EOPNOTSUPP;
1963
1964         return modify_qp(attrs, &cmd);
1965 }
1966
1967 static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
1968 {
1969         struct ib_uverbs_ex_modify_qp cmd;
1970         struct ib_uverbs_ex_modify_qp_resp resp = {
1971                 .response_length = uverbs_response_length(attrs, sizeof(resp))
1972         };
1973         int ret;
1974
1975         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
1976         if (ret)
1977                 return ret;
1978
1979         /*
1980          * Last bit is reserved for extending the attr_mask by
1981          * using another field.
1982          */
1983         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
1984
1985         if (cmd.base.attr_mask &
1986             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
1987                 return -EOPNOTSUPP;
1988
1989         ret = modify_qp(attrs, &cmd);
1990         if (ret)
1991                 return ret;
1992
1993         return uverbs_response(attrs, &resp, sizeof(resp));
1994 }
1995
1996 static int ib_uverbs_destroy_qp(struct uverbs_attr_bundle *attrs)
1997 {
1998         struct ib_uverbs_destroy_qp      cmd;
1999         struct ib_uverbs_destroy_qp_resp resp;
2000         struct ib_uobject               *uobj;
2001         struct ib_uqp_object            *obj;
2002         int ret;
2003
2004         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2005         if (ret)
2006                 return ret;
2007
2008         uobj = uobj_get_destroy(UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2009         if (IS_ERR(uobj))
2010                 return PTR_ERR(uobj);
2011
2012         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2013         memset(&resp, 0, sizeof(resp));
2014         resp.events_reported = obj->uevent.events_reported;
2015
2016         uobj_put_destroy(uobj);
2017
2018         return uverbs_response(attrs, &resp, sizeof(resp));
2019 }
2020
2021 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2022 {
2023         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2024                        sizeof (struct ib_sge))
2025                 return NULL;
2026
2027         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2028                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2029 }
2030
2031 static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
2032 {
2033         struct ib_uverbs_post_send      cmd;
2034         struct ib_uverbs_post_send_resp resp;
2035         struct ib_uverbs_send_wr       *user_wr;
2036         struct ib_send_wr              *wr = NULL, *last, *next;
2037         const struct ib_send_wr        *bad_wr;
2038         struct ib_qp                   *qp;
2039         int                             i, sg_ind;
2040         int                             is_ud;
2041         int ret, ret2;
2042         size_t                          next_size;
2043         const struct ib_sge __user *sgls;
2044         const void __user *wqes;
2045         struct uverbs_req_iter iter;
2046
2047         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2048         if (ret)
2049                 return ret;
2050         wqes = uverbs_request_next_ptr(&iter, cmd.wqe_size * cmd.wr_count);
2051         if (IS_ERR(wqes))
2052                 return PTR_ERR(wqes);
2053         sgls = uverbs_request_next_ptr(
2054                 &iter, cmd.sge_count * sizeof(struct ib_uverbs_sge));
2055         if (IS_ERR(sgls))
2056                 return PTR_ERR(sgls);
2057         ret = uverbs_request_finish(&iter);
2058         if (ret)
2059                 return ret;
2060
2061         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2062         if (!user_wr)
2063                 return -ENOMEM;
2064
2065         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2066         if (!qp)
2067                 goto out;
2068
2069         is_ud = qp->qp_type == IB_QPT_UD;
2070         sg_ind = 0;
2071         last = NULL;
2072         for (i = 0; i < cmd.wr_count; ++i) {
2073                 if (copy_from_user(user_wr, wqes + i * cmd.wqe_size,
2074                                    cmd.wqe_size)) {
2075                         ret = -EFAULT;
2076                         goto out_put;
2077                 }
2078
2079                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2080                         ret = -EINVAL;
2081                         goto out_put;
2082                 }
2083
2084                 if (is_ud) {
2085                         struct ib_ud_wr *ud;
2086
2087                         if (user_wr->opcode != IB_WR_SEND &&
2088                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2089                                 ret = -EINVAL;
2090                                 goto out_put;
2091                         }
2092
2093                         next_size = sizeof(*ud);
2094                         ud = alloc_wr(next_size, user_wr->num_sge);
2095                         if (!ud) {
2096                                 ret = -ENOMEM;
2097                                 goto out_put;
2098                         }
2099
2100                         ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH,
2101                                                    user_wr->wr.ud.ah, attrs);
2102                         if (!ud->ah) {
2103                                 kfree(ud);
2104                                 ret = -EINVAL;
2105                                 goto out_put;
2106                         }
2107                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2108                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2109
2110                         next = &ud->wr;
2111                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2112                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2113                            user_wr->opcode == IB_WR_RDMA_READ) {
2114                         struct ib_rdma_wr *rdma;
2115
2116                         next_size = sizeof(*rdma);
2117                         rdma = alloc_wr(next_size, user_wr->num_sge);
2118                         if (!rdma) {
2119                                 ret = -ENOMEM;
2120                                 goto out_put;
2121                         }
2122
2123                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2124                         rdma->rkey = user_wr->wr.rdma.rkey;
2125
2126                         next = &rdma->wr;
2127                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2128                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2129                         struct ib_atomic_wr *atomic;
2130
2131                         next_size = sizeof(*atomic);
2132                         atomic = alloc_wr(next_size, user_wr->num_sge);
2133                         if (!atomic) {
2134                                 ret = -ENOMEM;
2135                                 goto out_put;
2136                         }
2137
2138                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2139                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2140                         atomic->swap = user_wr->wr.atomic.swap;
2141                         atomic->rkey = user_wr->wr.atomic.rkey;
2142
2143                         next = &atomic->wr;
2144                 } else if (user_wr->opcode == IB_WR_SEND ||
2145                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2146                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2147                         next_size = sizeof(*next);
2148                         next = alloc_wr(next_size, user_wr->num_sge);
2149                         if (!next) {
2150                                 ret = -ENOMEM;
2151                                 goto out_put;
2152                         }
2153                 } else {
2154                         ret = -EINVAL;
2155                         goto out_put;
2156                 }
2157
2158                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2159                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2160                         next->ex.imm_data =
2161                                         (__be32 __force) user_wr->ex.imm_data;
2162                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2163                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2164                 }
2165
2166                 if (!last)
2167                         wr = next;
2168                 else
2169                         last->next = next;
2170                 last = next;
2171
2172                 next->next       = NULL;
2173                 next->wr_id      = user_wr->wr_id;
2174                 next->num_sge    = user_wr->num_sge;
2175                 next->opcode     = user_wr->opcode;
2176                 next->send_flags = user_wr->send_flags;
2177
2178                 if (next->num_sge) {
2179                         next->sg_list = (void *) next +
2180                                 ALIGN(next_size, sizeof(struct ib_sge));
2181                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2182                                            next->num_sge *
2183                                                    sizeof(struct ib_sge))) {
2184                                 ret = -EFAULT;
2185                                 goto out_put;
2186                         }
2187                         sg_ind += next->num_sge;
2188                 } else
2189                         next->sg_list = NULL;
2190         }
2191
2192         resp.bad_wr = 0;
2193         ret = qp->device->ops.post_send(qp->real_qp, wr, &bad_wr);
2194         if (ret)
2195                 for (next = wr; next; next = next->next) {
2196                         ++resp.bad_wr;
2197                         if (next == bad_wr)
2198                                 break;
2199                 }
2200
2201         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2202         if (ret2)
2203                 ret = ret2;
2204
2205 out_put:
2206         uobj_put_obj_read(qp);
2207
2208         while (wr) {
2209                 if (is_ud && ud_wr(wr)->ah)
2210                         uobj_put_obj_read(ud_wr(wr)->ah);
2211                 next = wr->next;
2212                 kfree(wr);
2213                 wr = next;
2214         }
2215
2216 out:
2217         kfree(user_wr);
2218
2219         return ret;
2220 }
2221
2222 static struct ib_recv_wr *
2223 ib_uverbs_unmarshall_recv(struct uverbs_req_iter *iter, u32 wr_count,
2224                           u32 wqe_size, u32 sge_count)
2225 {
2226         struct ib_uverbs_recv_wr *user_wr;
2227         struct ib_recv_wr        *wr = NULL, *last, *next;
2228         int                       sg_ind;
2229         int                       i;
2230         int                       ret;
2231         const struct ib_sge __user *sgls;
2232         const void __user *wqes;
2233
2234         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2235                 return ERR_PTR(-EINVAL);
2236
2237         wqes = uverbs_request_next_ptr(iter, wqe_size * wr_count);
2238         if (IS_ERR(wqes))
2239                 return ERR_CAST(wqes);
2240         sgls = uverbs_request_next_ptr(
2241                 iter, sge_count * sizeof(struct ib_uverbs_sge));
2242         if (IS_ERR(sgls))
2243                 return ERR_CAST(sgls);
2244         ret = uverbs_request_finish(iter);
2245         if (ret)
2246                 return ERR_PTR(ret);
2247
2248         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2249         if (!user_wr)
2250                 return ERR_PTR(-ENOMEM);
2251
2252         sg_ind = 0;
2253         last = NULL;
2254         for (i = 0; i < wr_count; ++i) {
2255                 if (copy_from_user(user_wr, wqes + i * wqe_size,
2256                                    wqe_size)) {
2257                         ret = -EFAULT;
2258                         goto err;
2259                 }
2260
2261                 if (user_wr->num_sge + sg_ind > sge_count) {
2262                         ret = -EINVAL;
2263                         goto err;
2264                 }
2265
2266                 if (user_wr->num_sge >=
2267                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2268                     sizeof (struct ib_sge)) {
2269                         ret = -EINVAL;
2270                         goto err;
2271                 }
2272
2273                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2274                                user_wr->num_sge * sizeof (struct ib_sge),
2275                                GFP_KERNEL);
2276                 if (!next) {
2277                         ret = -ENOMEM;
2278                         goto err;
2279                 }
2280
2281                 if (!last)
2282                         wr = next;
2283                 else
2284                         last->next = next;
2285                 last = next;
2286
2287                 next->next       = NULL;
2288                 next->wr_id      = user_wr->wr_id;
2289                 next->num_sge    = user_wr->num_sge;
2290
2291                 if (next->num_sge) {
2292                         next->sg_list = (void *) next +
2293                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2294                         if (copy_from_user(next->sg_list, sgls + sg_ind,
2295                                            next->num_sge *
2296                                                    sizeof(struct ib_sge))) {
2297                                 ret = -EFAULT;
2298                                 goto err;
2299                         }
2300                         sg_ind += next->num_sge;
2301                 } else
2302                         next->sg_list = NULL;
2303         }
2304
2305         kfree(user_wr);
2306         return wr;
2307
2308 err:
2309         kfree(user_wr);
2310
2311         while (wr) {
2312                 next = wr->next;
2313                 kfree(wr);
2314                 wr = next;
2315         }
2316
2317         return ERR_PTR(ret);
2318 }
2319
2320 static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs)
2321 {
2322         struct ib_uverbs_post_recv      cmd;
2323         struct ib_uverbs_post_recv_resp resp;
2324         struct ib_recv_wr              *wr, *next;
2325         const struct ib_recv_wr        *bad_wr;
2326         struct ib_qp                   *qp;
2327         int ret, ret2;
2328         struct uverbs_req_iter iter;
2329
2330         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2331         if (ret)
2332                 return ret;
2333
2334         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2335                                        cmd.sge_count);
2336         if (IS_ERR(wr))
2337                 return PTR_ERR(wr);
2338
2339         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2340         if (!qp) {
2341                 ret = -EINVAL;
2342                 goto out;
2343         }
2344
2345         resp.bad_wr = 0;
2346         ret = qp->device->ops.post_recv(qp->real_qp, wr, &bad_wr);
2347
2348         uobj_put_obj_read(qp);
2349         if (ret) {
2350                 for (next = wr; next; next = next->next) {
2351                         ++resp.bad_wr;
2352                         if (next == bad_wr)
2353                                 break;
2354                 }
2355         }
2356
2357         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2358         if (ret2)
2359                 ret = ret2;
2360 out:
2361         while (wr) {
2362                 next = wr->next;
2363                 kfree(wr);
2364                 wr = next;
2365         }
2366
2367         return ret;
2368 }
2369
2370 static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs)
2371 {
2372         struct ib_uverbs_post_srq_recv      cmd;
2373         struct ib_uverbs_post_srq_recv_resp resp;
2374         struct ib_recv_wr                  *wr, *next;
2375         const struct ib_recv_wr            *bad_wr;
2376         struct ib_srq                      *srq;
2377         int ret, ret2;
2378         struct uverbs_req_iter iter;
2379
2380         ret = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
2381         if (ret)
2382                 return ret;
2383
2384         wr = ib_uverbs_unmarshall_recv(&iter, cmd.wr_count, cmd.wqe_size,
2385                                        cmd.sge_count);
2386         if (IS_ERR(wr))
2387                 return PTR_ERR(wr);
2388
2389         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
2390         if (!srq) {
2391                 ret = -EINVAL;
2392                 goto out;
2393         }
2394
2395         resp.bad_wr = 0;
2396         ret = srq->device->ops.post_srq_recv(srq, wr, &bad_wr);
2397
2398         uobj_put_obj_read(srq);
2399
2400         if (ret)
2401                 for (next = wr; next; next = next->next) {
2402                         ++resp.bad_wr;
2403                         if (next == bad_wr)
2404                                 break;
2405                 }
2406
2407         ret2 = uverbs_response(attrs, &resp, sizeof(resp));
2408         if (ret2)
2409                 ret = ret2;
2410
2411 out:
2412         while (wr) {
2413                 next = wr->next;
2414                 kfree(wr);
2415                 wr = next;
2416         }
2417
2418         return ret;
2419 }
2420
2421 static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs)
2422 {
2423         struct ib_uverbs_create_ah       cmd;
2424         struct ib_uverbs_create_ah_resp  resp;
2425         struct ib_uobject               *uobj;
2426         struct ib_pd                    *pd;
2427         struct ib_ah                    *ah;
2428         struct rdma_ah_attr             attr = {};
2429         int ret;
2430         struct ib_device *ib_dev;
2431
2432         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2433         if (ret)
2434                 return ret;
2435
2436         uobj = uobj_alloc(UVERBS_OBJECT_AH, attrs, &ib_dev);
2437         if (IS_ERR(uobj))
2438                 return PTR_ERR(uobj);
2439
2440         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num)) {
2441                 ret = -EINVAL;
2442                 goto err;
2443         }
2444
2445         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2446         if (!pd) {
2447                 ret = -EINVAL;
2448                 goto err;
2449         }
2450
2451         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2452         rdma_ah_set_make_grd(&attr, false);
2453         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2454         rdma_ah_set_sl(&attr, cmd.attr.sl);
2455         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2456         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2457         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2458
2459         if (cmd.attr.is_global) {
2460                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2461                                 cmd.attr.grh.sgid_index,
2462                                 cmd.attr.grh.hop_limit,
2463                                 cmd.attr.grh.traffic_class);
2464                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2465         } else {
2466                 rdma_ah_set_ah_flags(&attr, 0);
2467         }
2468
2469         ah = rdma_create_user_ah(pd, &attr, &attrs->driver_udata);
2470         if (IS_ERR(ah)) {
2471                 ret = PTR_ERR(ah);
2472                 goto err_put;
2473         }
2474
2475         ah->uobject  = uobj;
2476         uobj->user_handle = cmd.user_handle;
2477         uobj->object = ah;
2478
2479         resp.ah_handle = uobj->id;
2480
2481         ret = uverbs_response(attrs, &resp, sizeof(resp));
2482         if (ret)
2483                 goto err_copy;
2484
2485         uobj_put_obj_read(pd);
2486         return uobj_alloc_commit(uobj);
2487
2488 err_copy:
2489         rdma_destroy_ah(ah, RDMA_DESTROY_AH_SLEEPABLE);
2490
2491 err_put:
2492         uobj_put_obj_read(pd);
2493
2494 err:
2495         uobj_alloc_abort(uobj);
2496         return ret;
2497 }
2498
2499 static int ib_uverbs_destroy_ah(struct uverbs_attr_bundle *attrs)
2500 {
2501         struct ib_uverbs_destroy_ah cmd;
2502         int ret;
2503
2504         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2505         if (ret)
2506                 return ret;
2507
2508         return uobj_perform_destroy(UVERBS_OBJECT_AH, cmd.ah_handle, attrs);
2509 }
2510
2511 static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs)
2512 {
2513         struct ib_uverbs_attach_mcast cmd;
2514         struct ib_qp                 *qp;
2515         struct ib_uqp_object         *obj;
2516         struct ib_uverbs_mcast_entry *mcast;
2517         int                           ret;
2518
2519         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2520         if (ret)
2521                 return ret;
2522
2523         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2524         if (!qp)
2525                 return -EINVAL;
2526
2527         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2528
2529         mutex_lock(&obj->mcast_lock);
2530         list_for_each_entry(mcast, &obj->mcast_list, list)
2531                 if (cmd.mlid == mcast->lid &&
2532                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2533                         ret = 0;
2534                         goto out_put;
2535                 }
2536
2537         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2538         if (!mcast) {
2539                 ret = -ENOMEM;
2540                 goto out_put;
2541         }
2542
2543         mcast->lid = cmd.mlid;
2544         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2545
2546         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2547         if (!ret)
2548                 list_add_tail(&mcast->list, &obj->mcast_list);
2549         else
2550                 kfree(mcast);
2551
2552 out_put:
2553         mutex_unlock(&obj->mcast_lock);
2554         uobj_put_obj_read(qp);
2555
2556         return ret;
2557 }
2558
2559 static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs)
2560 {
2561         struct ib_uverbs_detach_mcast cmd;
2562         struct ib_uqp_object         *obj;
2563         struct ib_qp                 *qp;
2564         struct ib_uverbs_mcast_entry *mcast;
2565         int                           ret = -EINVAL;
2566         bool                          found = false;
2567
2568         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
2569         if (ret)
2570                 return ret;
2571
2572         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
2573         if (!qp)
2574                 return -EINVAL;
2575
2576         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2577         mutex_lock(&obj->mcast_lock);
2578
2579         list_for_each_entry(mcast, &obj->mcast_list, list)
2580                 if (cmd.mlid == mcast->lid &&
2581                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2582                         list_del(&mcast->list);
2583                         kfree(mcast);
2584                         found = true;
2585                         break;
2586                 }
2587
2588         if (!found) {
2589                 ret = -EINVAL;
2590                 goto out_put;
2591         }
2592
2593         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2594
2595 out_put:
2596         mutex_unlock(&obj->mcast_lock);
2597         uobj_put_obj_read(qp);
2598         return ret;
2599 }
2600
2601 struct ib_uflow_resources *flow_resources_alloc(size_t num_specs)
2602 {
2603         struct ib_uflow_resources *resources;
2604
2605         resources = kzalloc(sizeof(*resources), GFP_KERNEL);
2606
2607         if (!resources)
2608                 return NULL;
2609
2610         if (!num_specs)
2611                 goto out;
2612
2613         resources->counters =
2614                 kcalloc(num_specs, sizeof(*resources->counters), GFP_KERNEL);
2615         resources->collection =
2616                 kcalloc(num_specs, sizeof(*resources->collection), GFP_KERNEL);
2617
2618         if (!resources->counters || !resources->collection)
2619                 goto err;
2620
2621 out:
2622         resources->max = num_specs;
2623         return resources;
2624
2625 err:
2626         kfree(resources->counters);
2627         kfree(resources);
2628
2629         return NULL;
2630 }
2631 EXPORT_SYMBOL(flow_resources_alloc);
2632
2633 void ib_uverbs_flow_resources_free(struct ib_uflow_resources *uflow_res)
2634 {
2635         unsigned int i;
2636
2637         if (!uflow_res)
2638                 return;
2639
2640         for (i = 0; i < uflow_res->collection_num; i++)
2641                 atomic_dec(&uflow_res->collection[i]->usecnt);
2642
2643         for (i = 0; i < uflow_res->counters_num; i++)
2644                 atomic_dec(&uflow_res->counters[i]->usecnt);
2645
2646         kfree(uflow_res->collection);
2647         kfree(uflow_res->counters);
2648         kfree(uflow_res);
2649 }
2650 EXPORT_SYMBOL(ib_uverbs_flow_resources_free);
2651
2652 void flow_resources_add(struct ib_uflow_resources *uflow_res,
2653                         enum ib_flow_spec_type type,
2654                         void *ibobj)
2655 {
2656         WARN_ON(uflow_res->num >= uflow_res->max);
2657
2658         switch (type) {
2659         case IB_FLOW_SPEC_ACTION_HANDLE:
2660                 atomic_inc(&((struct ib_flow_action *)ibobj)->usecnt);
2661                 uflow_res->collection[uflow_res->collection_num++] =
2662                         (struct ib_flow_action *)ibobj;
2663                 break;
2664         case IB_FLOW_SPEC_ACTION_COUNT:
2665                 atomic_inc(&((struct ib_counters *)ibobj)->usecnt);
2666                 uflow_res->counters[uflow_res->counters_num++] =
2667                         (struct ib_counters *)ibobj;
2668                 break;
2669         default:
2670                 WARN_ON(1);
2671         }
2672
2673         uflow_res->num++;
2674 }
2675 EXPORT_SYMBOL(flow_resources_add);
2676
2677 static int kern_spec_to_ib_spec_action(const struct uverbs_attr_bundle *attrs,
2678                                        struct ib_uverbs_flow_spec *kern_spec,
2679                                        union ib_flow_spec *ib_spec,
2680                                        struct ib_uflow_resources *uflow_res)
2681 {
2682         ib_spec->type = kern_spec->type;
2683         switch (ib_spec->type) {
2684         case IB_FLOW_SPEC_ACTION_TAG:
2685                 if (kern_spec->flow_tag.size !=
2686                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2687                         return -EINVAL;
2688
2689                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2690                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2691                 break;
2692         case IB_FLOW_SPEC_ACTION_DROP:
2693                 if (kern_spec->drop.size !=
2694                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2695                         return -EINVAL;
2696
2697                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2698                 break;
2699         case IB_FLOW_SPEC_ACTION_HANDLE:
2700                 if (kern_spec->action.size !=
2701                     sizeof(struct ib_uverbs_flow_spec_action_handle))
2702                         return -EOPNOTSUPP;
2703                 ib_spec->action.act = uobj_get_obj_read(flow_action,
2704                                                         UVERBS_OBJECT_FLOW_ACTION,
2705                                                         kern_spec->action.handle,
2706                                                         attrs);
2707                 if (!ib_spec->action.act)
2708                         return -EINVAL;
2709                 ib_spec->action.size =
2710                         sizeof(struct ib_flow_spec_action_handle);
2711                 flow_resources_add(uflow_res,
2712                                    IB_FLOW_SPEC_ACTION_HANDLE,
2713                                    ib_spec->action.act);
2714                 uobj_put_obj_read(ib_spec->action.act);
2715                 break;
2716         case IB_FLOW_SPEC_ACTION_COUNT:
2717                 if (kern_spec->flow_count.size !=
2718                         sizeof(struct ib_uverbs_flow_spec_action_count))
2719                         return -EINVAL;
2720                 ib_spec->flow_count.counters =
2721                         uobj_get_obj_read(counters,
2722                                           UVERBS_OBJECT_COUNTERS,
2723                                           kern_spec->flow_count.handle,
2724                                           attrs);
2725                 if (!ib_spec->flow_count.counters)
2726                         return -EINVAL;
2727                 ib_spec->flow_count.size =
2728                                 sizeof(struct ib_flow_spec_action_count);
2729                 flow_resources_add(uflow_res,
2730                                    IB_FLOW_SPEC_ACTION_COUNT,
2731                                    ib_spec->flow_count.counters);
2732                 uobj_put_obj_read(ib_spec->flow_count.counters);
2733                 break;
2734         default:
2735                 return -EINVAL;
2736         }
2737         return 0;
2738 }
2739
2740 static size_t kern_spec_filter_sz(const struct ib_uverbs_flow_spec_hdr *spec)
2741 {
2742         /* Returns user space filter size, includes padding */
2743         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2744 }
2745
2746 static ssize_t spec_filter_size(const void *kern_spec_filter, u16 kern_filter_size,
2747                                 u16 ib_real_filter_sz)
2748 {
2749         /*
2750          * User space filter structures must be 64 bit aligned, otherwise this
2751          * may pass, but we won't handle additional new attributes.
2752          */
2753
2754         if (kern_filter_size > ib_real_filter_sz) {
2755                 if (memchr_inv(kern_spec_filter +
2756                                ib_real_filter_sz, 0,
2757                                kern_filter_size - ib_real_filter_sz))
2758                         return -EINVAL;
2759                 return ib_real_filter_sz;
2760         }
2761         return kern_filter_size;
2762 }
2763
2764 int ib_uverbs_kern_spec_to_ib_spec_filter(enum ib_flow_spec_type type,
2765                                           const void *kern_spec_mask,
2766                                           const void *kern_spec_val,
2767                                           size_t kern_filter_sz,
2768                                           union ib_flow_spec *ib_spec)
2769 {
2770         ssize_t actual_filter_sz;
2771         ssize_t ib_filter_sz;
2772
2773         /* User flow spec size must be aligned to 4 bytes */
2774         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2775                 return -EINVAL;
2776
2777         ib_spec->type = type;
2778
2779         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2780                 return -EINVAL;
2781
2782         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2783         case IB_FLOW_SPEC_ETH:
2784                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2785                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2786                                                     kern_filter_sz,
2787                                                     ib_filter_sz);
2788                 if (actual_filter_sz <= 0)
2789                         return -EINVAL;
2790                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2791                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2792                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2793                 break;
2794         case IB_FLOW_SPEC_IPV4:
2795                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2796                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2797                                                     kern_filter_sz,
2798                                                     ib_filter_sz);
2799                 if (actual_filter_sz <= 0)
2800                         return -EINVAL;
2801                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2802                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2803                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2804                 break;
2805         case IB_FLOW_SPEC_IPV6:
2806                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2807                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2808                                                     kern_filter_sz,
2809                                                     ib_filter_sz);
2810                 if (actual_filter_sz <= 0)
2811                         return -EINVAL;
2812                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2813                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2814                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2815
2816                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2817                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2818                         return -EINVAL;
2819                 break;
2820         case IB_FLOW_SPEC_TCP:
2821         case IB_FLOW_SPEC_UDP:
2822                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2823                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2824                                                     kern_filter_sz,
2825                                                     ib_filter_sz);
2826                 if (actual_filter_sz <= 0)
2827                         return -EINVAL;
2828                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2829                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2830                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2831                 break;
2832         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2833                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2834                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2835                                                     kern_filter_sz,
2836                                                     ib_filter_sz);
2837                 if (actual_filter_sz <= 0)
2838                         return -EINVAL;
2839                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2840                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2841                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2842
2843                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2844                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2845                         return -EINVAL;
2846                 break;
2847         case IB_FLOW_SPEC_ESP:
2848                 ib_filter_sz = offsetof(struct ib_flow_esp_filter, real_sz);
2849                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2850                                                     kern_filter_sz,
2851                                                     ib_filter_sz);
2852                 if (actual_filter_sz <= 0)
2853                         return -EINVAL;
2854                 ib_spec->esp.size = sizeof(struct ib_flow_spec_esp);
2855                 memcpy(&ib_spec->esp.val, kern_spec_val, actual_filter_sz);
2856                 memcpy(&ib_spec->esp.mask, kern_spec_mask, actual_filter_sz);
2857                 break;
2858         case IB_FLOW_SPEC_GRE:
2859                 ib_filter_sz = offsetof(struct ib_flow_gre_filter, real_sz);
2860                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2861                                                     kern_filter_sz,
2862                                                     ib_filter_sz);
2863                 if (actual_filter_sz <= 0)
2864                         return -EINVAL;
2865                 ib_spec->gre.size = sizeof(struct ib_flow_spec_gre);
2866                 memcpy(&ib_spec->gre.val, kern_spec_val, actual_filter_sz);
2867                 memcpy(&ib_spec->gre.mask, kern_spec_mask, actual_filter_sz);
2868                 break;
2869         case IB_FLOW_SPEC_MPLS:
2870                 ib_filter_sz = offsetof(struct ib_flow_mpls_filter, real_sz);
2871                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2872                                                     kern_filter_sz,
2873                                                     ib_filter_sz);
2874                 if (actual_filter_sz <= 0)
2875                         return -EINVAL;
2876                 ib_spec->mpls.size = sizeof(struct ib_flow_spec_mpls);
2877                 memcpy(&ib_spec->mpls.val, kern_spec_val, actual_filter_sz);
2878                 memcpy(&ib_spec->mpls.mask, kern_spec_mask, actual_filter_sz);
2879                 break;
2880         default:
2881                 return -EINVAL;
2882         }
2883         return 0;
2884 }
2885
2886 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2887                                        union ib_flow_spec *ib_spec)
2888 {
2889         ssize_t kern_filter_sz;
2890         void *kern_spec_mask;
2891         void *kern_spec_val;
2892
2893         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2894
2895         kern_spec_val = (void *)kern_spec +
2896                 sizeof(struct ib_uverbs_flow_spec_hdr);
2897         kern_spec_mask = kern_spec_val + kern_filter_sz;
2898
2899         return ib_uverbs_kern_spec_to_ib_spec_filter(kern_spec->type,
2900                                                      kern_spec_mask,
2901                                                      kern_spec_val,
2902                                                      kern_filter_sz, ib_spec);
2903 }
2904
2905 static int kern_spec_to_ib_spec(struct uverbs_attr_bundle *attrs,
2906                                 struct ib_uverbs_flow_spec *kern_spec,
2907                                 union ib_flow_spec *ib_spec,
2908                                 struct ib_uflow_resources *uflow_res)
2909 {
2910         if (kern_spec->reserved)
2911                 return -EINVAL;
2912
2913         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2914                 return kern_spec_to_ib_spec_action(attrs, kern_spec, ib_spec,
2915                                                    uflow_res);
2916         else
2917                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2918 }
2919
2920 static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs)
2921 {
2922         struct ib_uverbs_ex_create_wq cmd;
2923         struct ib_uverbs_ex_create_wq_resp resp = {};
2924         struct ib_uwq_object           *obj;
2925         int err = 0;
2926         struct ib_cq *cq;
2927         struct ib_pd *pd;
2928         struct ib_wq *wq;
2929         struct ib_wq_init_attr wq_init_attr = {};
2930         struct ib_device *ib_dev;
2931
2932         err = uverbs_request(attrs, &cmd, sizeof(cmd));
2933         if (err)
2934                 return err;
2935
2936         if (cmd.comp_mask)
2937                 return -EOPNOTSUPP;
2938
2939         obj = (struct ib_uwq_object *)uobj_alloc(UVERBS_OBJECT_WQ, attrs,
2940                                                  &ib_dev);
2941         if (IS_ERR(obj))
2942                 return PTR_ERR(obj);
2943
2944         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs);
2945         if (!pd) {
2946                 err = -EINVAL;
2947                 goto err_uobj;
2948         }
2949
2950         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
2951         if (!cq) {
2952                 err = -EINVAL;
2953                 goto err_put_pd;
2954         }
2955
2956         wq_init_attr.cq = cq;
2957         wq_init_attr.max_sge = cmd.max_sge;
2958         wq_init_attr.max_wr = cmd.max_wr;
2959         wq_init_attr.wq_context = attrs->ufile;
2960         wq_init_attr.wq_type = cmd.wq_type;
2961         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2962         wq_init_attr.create_flags = cmd.create_flags;
2963         obj->uevent.events_reported = 0;
2964         INIT_LIST_HEAD(&obj->uevent.event_list);
2965
2966         wq = pd->device->ops.create_wq(pd, &wq_init_attr, &attrs->driver_udata);
2967         if (IS_ERR(wq)) {
2968                 err = PTR_ERR(wq);
2969                 goto err_put_cq;
2970         }
2971
2972         wq->uobject = &obj->uevent.uobject;
2973         obj->uevent.uobject.object = wq;
2974         wq->wq_type = wq_init_attr.wq_type;
2975         wq->cq = cq;
2976         wq->pd = pd;
2977         wq->device = pd->device;
2978         wq->wq_context = wq_init_attr.wq_context;
2979         atomic_set(&wq->usecnt, 0);
2980         atomic_inc(&pd->usecnt);
2981         atomic_inc(&cq->usecnt);
2982         wq->uobject = &obj->uevent.uobject;
2983         obj->uevent.uobject.object = wq;
2984
2985         memset(&resp, 0, sizeof(resp));
2986         resp.wq_handle = obj->uevent.uobject.id;
2987         resp.max_sge = wq_init_attr.max_sge;
2988         resp.max_wr = wq_init_attr.max_wr;
2989         resp.wqn = wq->wq_num;
2990         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
2991         err = uverbs_response(attrs, &resp, sizeof(resp));
2992         if (err)
2993                 goto err_copy;
2994
2995         uobj_put_obj_read(pd);
2996         uobj_put_obj_read(cq);
2997         return uobj_alloc_commit(&obj->uevent.uobject);
2998
2999 err_copy:
3000         ib_destroy_wq(wq);
3001 err_put_cq:
3002         uobj_put_obj_read(cq);
3003 err_put_pd:
3004         uobj_put_obj_read(pd);
3005 err_uobj:
3006         uobj_alloc_abort(&obj->uevent.uobject);
3007
3008         return err;
3009 }
3010
3011 static int ib_uverbs_ex_destroy_wq(struct uverbs_attr_bundle *attrs)
3012 {
3013         struct ib_uverbs_ex_destroy_wq  cmd;
3014         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
3015         struct ib_uobject               *uobj;
3016         struct ib_uwq_object            *obj;
3017         int                             ret;
3018
3019         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3020         if (ret)
3021                 return ret;
3022
3023         if (cmd.comp_mask)
3024                 return -EOPNOTSUPP;
3025
3026         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3027         uobj = uobj_get_destroy(UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3028         if (IS_ERR(uobj))
3029                 return PTR_ERR(uobj);
3030
3031         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3032         resp.events_reported = obj->uevent.events_reported;
3033
3034         uobj_put_destroy(uobj);
3035
3036         return uverbs_response(attrs, &resp, sizeof(resp));
3037 }
3038
3039 static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs)
3040 {
3041         struct ib_uverbs_ex_modify_wq cmd;
3042         struct ib_wq *wq;
3043         struct ib_wq_attr wq_attr = {};
3044         int ret;
3045
3046         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3047         if (ret)
3048                 return ret;
3049
3050         if (!cmd.attr_mask)
3051                 return -EINVAL;
3052
3053         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3054                 return -EINVAL;
3055
3056         wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs);
3057         if (!wq)
3058                 return -EINVAL;
3059
3060         wq_attr.curr_wq_state = cmd.curr_wq_state;
3061         wq_attr.wq_state = cmd.wq_state;
3062         if (cmd.attr_mask & IB_WQ_FLAGS) {
3063                 wq_attr.flags = cmd.flags;
3064                 wq_attr.flags_mask = cmd.flags_mask;
3065         }
3066         ret = wq->device->ops.modify_wq(wq, &wq_attr, cmd.attr_mask,
3067                                         &attrs->driver_udata);
3068         uobj_put_obj_read(wq);
3069         return ret;
3070 }
3071
3072 static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3073 {
3074         struct ib_uverbs_ex_create_rwq_ind_table cmd;
3075         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3076         struct ib_uobject                 *uobj;
3077         int err;
3078         struct ib_rwq_ind_table_init_attr init_attr = {};
3079         struct ib_rwq_ind_table *rwq_ind_tbl;
3080         struct ib_wq    **wqs = NULL;
3081         u32 *wqs_handles = NULL;
3082         struct ib_wq    *wq = NULL;
3083         int i, j, num_read_wqs;
3084         u32 num_wq_handles;
3085         struct uverbs_req_iter iter;
3086         struct ib_device *ib_dev;
3087
3088         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3089         if (err)
3090                 return err;
3091
3092         if (cmd.comp_mask)
3093                 return -EOPNOTSUPP;
3094
3095         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3096                 return -EINVAL;
3097
3098         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3099         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3100                               GFP_KERNEL);
3101         if (!wqs_handles)
3102                 return -ENOMEM;
3103
3104         err = uverbs_request_next(&iter, wqs_handles,
3105                                   num_wq_handles * sizeof(__u32));
3106         if (err)
3107                 goto err_free;
3108
3109         err = uverbs_request_finish(&iter);
3110         if (err)
3111                 goto err_free;
3112
3113         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3114         if (!wqs) {
3115                 err = -ENOMEM;
3116                 goto  err_free;
3117         }
3118
3119         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3120                         num_read_wqs++) {
3121                 wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ,
3122                                        wqs_handles[num_read_wqs], attrs);
3123                 if (!wq) {
3124                         err = -EINVAL;
3125                         goto put_wqs;
3126                 }
3127
3128                 wqs[num_read_wqs] = wq;
3129         }
3130
3131         uobj = uobj_alloc(UVERBS_OBJECT_RWQ_IND_TBL, attrs, &ib_dev);
3132         if (IS_ERR(uobj)) {
3133                 err = PTR_ERR(uobj);
3134                 goto put_wqs;
3135         }
3136
3137         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3138         init_attr.ind_tbl = wqs;
3139
3140         rwq_ind_tbl = ib_dev->ops.create_rwq_ind_table(ib_dev, &init_attr,
3141                                                        &attrs->driver_udata);
3142
3143         if (IS_ERR(rwq_ind_tbl)) {
3144                 err = PTR_ERR(rwq_ind_tbl);
3145                 goto err_uobj;
3146         }
3147
3148         rwq_ind_tbl->ind_tbl = wqs;
3149         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3150         rwq_ind_tbl->uobject = uobj;
3151         uobj->object = rwq_ind_tbl;
3152         rwq_ind_tbl->device = ib_dev;
3153         atomic_set(&rwq_ind_tbl->usecnt, 0);
3154
3155         for (i = 0; i < num_wq_handles; i++)
3156                 atomic_inc(&wqs[i]->usecnt);
3157
3158         resp.ind_tbl_handle = uobj->id;
3159         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3160         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3161
3162         err = uverbs_response(attrs, &resp, sizeof(resp));
3163         if (err)
3164                 goto err_copy;
3165
3166         kfree(wqs_handles);
3167
3168         for (j = 0; j < num_read_wqs; j++)
3169                 uobj_put_obj_read(wqs[j]);
3170
3171         return uobj_alloc_commit(uobj);
3172
3173 err_copy:
3174         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3175 err_uobj:
3176         uobj_alloc_abort(uobj);
3177 put_wqs:
3178         for (j = 0; j < num_read_wqs; j++)
3179                 uobj_put_obj_read(wqs[j]);
3180 err_free:
3181         kfree(wqs_handles);
3182         kfree(wqs);
3183         return err;
3184 }
3185
3186 static int ib_uverbs_ex_destroy_rwq_ind_table(struct uverbs_attr_bundle *attrs)
3187 {
3188         struct ib_uverbs_ex_destroy_rwq_ind_table cmd;
3189         int ret;
3190
3191         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3192         if (ret)
3193                 return ret;
3194
3195         if (cmd.comp_mask)
3196                 return -EOPNOTSUPP;
3197
3198         return uobj_perform_destroy(UVERBS_OBJECT_RWQ_IND_TBL,
3199                                     cmd.ind_tbl_handle, attrs);
3200 }
3201
3202 static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs)
3203 {
3204         struct ib_uverbs_create_flow      cmd;
3205         struct ib_uverbs_create_flow_resp resp;
3206         struct ib_uobject                 *uobj;
3207         struct ib_flow                    *flow_id;
3208         struct ib_uverbs_flow_attr        *kern_flow_attr;
3209         struct ib_flow_attr               *flow_attr;
3210         struct ib_qp                      *qp;
3211         struct ib_uflow_resources         *uflow_res;
3212         struct ib_uverbs_flow_spec_hdr    *kern_spec;
3213         struct uverbs_req_iter iter;
3214         int err;
3215         void *ib_spec;
3216         int i;
3217         struct ib_device *ib_dev;
3218
3219         err = uverbs_request_start(attrs, &iter, &cmd, sizeof(cmd));
3220         if (err)
3221                 return err;
3222
3223         if (cmd.comp_mask)
3224                 return -EINVAL;
3225
3226         if (!capable(CAP_NET_RAW))
3227                 return -EPERM;
3228
3229         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3230                 return -EINVAL;
3231
3232         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3233             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3234              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3235                 return -EINVAL;
3236
3237         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3238                 return -EINVAL;
3239
3240         if (cmd.flow_attr.size >
3241             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3242                 return -EINVAL;
3243
3244         if (cmd.flow_attr.reserved[0] ||
3245             cmd.flow_attr.reserved[1])
3246                 return -EINVAL;
3247
3248         if (cmd.flow_attr.num_of_specs) {
3249                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3250                                          GFP_KERNEL);
3251                 if (!kern_flow_attr)
3252                         return -ENOMEM;
3253
3254                 *kern_flow_attr = cmd.flow_attr;
3255                 err = uverbs_request_next(&iter, &kern_flow_attr->flow_specs,
3256                                           cmd.flow_attr.size);
3257                 if (err)
3258                         goto err_free_attr;
3259         } else {
3260                 kern_flow_attr = &cmd.flow_attr;
3261         }
3262
3263         err = uverbs_request_finish(&iter);
3264         if (err)
3265                 goto err_free_attr;
3266
3267         uobj = uobj_alloc(UVERBS_OBJECT_FLOW, attrs, &ib_dev);
3268         if (IS_ERR(uobj)) {
3269                 err = PTR_ERR(uobj);
3270                 goto err_free_attr;
3271         }
3272
3273         qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs);
3274         if (!qp) {
3275                 err = -EINVAL;
3276                 goto err_uobj;
3277         }
3278
3279         if (qp->qp_type != IB_QPT_UD && qp->qp_type != IB_QPT_RAW_PACKET) {
3280                 err = -EINVAL;
3281                 goto err_put;
3282         }
3283
3284         flow_attr = kzalloc(struct_size(flow_attr, flows,
3285                                 cmd.flow_attr.num_of_specs), GFP_KERNEL);
3286         if (!flow_attr) {
3287                 err = -ENOMEM;
3288                 goto err_put;
3289         }
3290         uflow_res = flow_resources_alloc(cmd.flow_attr.num_of_specs);
3291         if (!uflow_res) {
3292                 err = -ENOMEM;
3293                 goto err_free_flow_attr;
3294         }
3295
3296         flow_attr->type = kern_flow_attr->type;
3297         flow_attr->priority = kern_flow_attr->priority;
3298         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3299         flow_attr->port = kern_flow_attr->port;
3300         flow_attr->flags = kern_flow_attr->flags;
3301         flow_attr->size = sizeof(*flow_attr);
3302
3303         kern_spec = kern_flow_attr->flow_specs;
3304         ib_spec = flow_attr + 1;
3305         for (i = 0; i < flow_attr->num_of_specs &&
3306                         cmd.flow_attr.size >= sizeof(*kern_spec) &&
3307                         cmd.flow_attr.size >= kern_spec->size;
3308              i++) {
3309                 err = kern_spec_to_ib_spec(
3310                                 attrs, (struct ib_uverbs_flow_spec *)kern_spec,
3311                                 ib_spec, uflow_res);
3312                 if (err)
3313                         goto err_free;
3314
3315                 flow_attr->size +=
3316                         ((union ib_flow_spec *) ib_spec)->size;
3317                 cmd.flow_attr.size -= kern_spec->size;
3318                 kern_spec = ((void *)kern_spec) + kern_spec->size;
3319                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3320         }
3321         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3322                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3323                         i, cmd.flow_attr.size);
3324                 err = -EINVAL;
3325                 goto err_free;
3326         }
3327
3328         flow_id = qp->device->ops.create_flow(
3329                 qp, flow_attr, IB_FLOW_DOMAIN_USER, &attrs->driver_udata);
3330
3331         if (IS_ERR(flow_id)) {
3332                 err = PTR_ERR(flow_id);
3333                 goto err_free;
3334         }
3335
3336         ib_set_flow(uobj, flow_id, qp, qp->device, uflow_res);
3337
3338         memset(&resp, 0, sizeof(resp));
3339         resp.flow_handle = uobj->id;
3340
3341         err = uverbs_response(attrs, &resp, sizeof(resp));
3342         if (err)
3343                 goto err_copy;
3344
3345         uobj_put_obj_read(qp);
3346         kfree(flow_attr);
3347         if (cmd.flow_attr.num_of_specs)
3348                 kfree(kern_flow_attr);
3349         return uobj_alloc_commit(uobj);
3350 err_copy:
3351         if (!qp->device->ops.destroy_flow(flow_id))
3352                 atomic_dec(&qp->usecnt);
3353 err_free:
3354         ib_uverbs_flow_resources_free(uflow_res);
3355 err_free_flow_attr:
3356         kfree(flow_attr);
3357 err_put:
3358         uobj_put_obj_read(qp);
3359 err_uobj:
3360         uobj_alloc_abort(uobj);
3361 err_free_attr:
3362         if (cmd.flow_attr.num_of_specs)
3363                 kfree(kern_flow_attr);
3364         return err;
3365 }
3366
3367 static int ib_uverbs_ex_destroy_flow(struct uverbs_attr_bundle *attrs)
3368 {
3369         struct ib_uverbs_destroy_flow   cmd;
3370         int                             ret;
3371
3372         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3373         if (ret)
3374                 return ret;
3375
3376         if (cmd.comp_mask)
3377                 return -EINVAL;
3378
3379         return uobj_perform_destroy(UVERBS_OBJECT_FLOW, cmd.flow_handle, attrs);
3380 }
3381
3382 static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs,
3383                                 struct ib_uverbs_create_xsrq *cmd,
3384                                 struct ib_udata *udata)
3385 {
3386         struct ib_uverbs_create_srq_resp resp;
3387         struct ib_usrq_object           *obj;
3388         struct ib_pd                    *pd;
3389         struct ib_srq                   *srq;
3390         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3391         struct ib_srq_init_attr          attr;
3392         int ret;
3393         struct ib_device *ib_dev;
3394
3395         obj = (struct ib_usrq_object *)uobj_alloc(UVERBS_OBJECT_SRQ, attrs,
3396                                                   &ib_dev);
3397         if (IS_ERR(obj))
3398                 return PTR_ERR(obj);
3399
3400         if (cmd->srq_type == IB_SRQT_TM)
3401                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3402
3403         if (cmd->srq_type == IB_SRQT_XRC) {
3404                 xrcd_uobj = uobj_get_read(UVERBS_OBJECT_XRCD, cmd->xrcd_handle,
3405                                           attrs);
3406                 if (IS_ERR(xrcd_uobj)) {
3407                         ret = -EINVAL;
3408                         goto err;
3409                 }
3410
3411                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3412                 if (!attr.ext.xrc.xrcd) {
3413                         ret = -EINVAL;
3414                         goto err_put_xrcd;
3415                 }
3416
3417                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3418                 atomic_inc(&obj->uxrcd->refcnt);
3419         }
3420
3421         if (ib_srq_has_cq(cmd->srq_type)) {
3422                 attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ,
3423                                                 cmd->cq_handle, attrs);
3424                 if (!attr.ext.cq) {
3425                         ret = -EINVAL;
3426                         goto err_put_xrcd;
3427                 }
3428         }
3429
3430         pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs);
3431         if (!pd) {
3432                 ret = -EINVAL;
3433                 goto err_put_cq;
3434         }
3435
3436         attr.event_handler  = ib_uverbs_srq_event_handler;
3437         attr.srq_context    = attrs->ufile;
3438         attr.srq_type       = cmd->srq_type;
3439         attr.attr.max_wr    = cmd->max_wr;
3440         attr.attr.max_sge   = cmd->max_sge;
3441         attr.attr.srq_limit = cmd->srq_limit;
3442
3443         obj->uevent.events_reported = 0;
3444         INIT_LIST_HEAD(&obj->uevent.event_list);
3445
3446         srq = pd->device->ops.create_srq(pd, &attr, udata);
3447         if (IS_ERR(srq)) {
3448                 ret = PTR_ERR(srq);
3449                 goto err_put;
3450         }
3451
3452         srq->device        = pd->device;
3453         srq->pd            = pd;
3454         srq->srq_type      = cmd->srq_type;
3455         srq->uobject       = &obj->uevent.uobject;
3456         srq->event_handler = attr.event_handler;
3457         srq->srq_context   = attr.srq_context;
3458
3459         if (ib_srq_has_cq(cmd->srq_type)) {
3460                 srq->ext.cq       = attr.ext.cq;
3461                 atomic_inc(&attr.ext.cq->usecnt);
3462         }
3463
3464         if (cmd->srq_type == IB_SRQT_XRC) {
3465                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3466                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3467         }
3468
3469         atomic_inc(&pd->usecnt);
3470         atomic_set(&srq->usecnt, 0);
3471
3472         obj->uevent.uobject.object = srq;
3473         obj->uevent.uobject.user_handle = cmd->user_handle;
3474
3475         memset(&resp, 0, sizeof resp);
3476         resp.srq_handle = obj->uevent.uobject.id;
3477         resp.max_wr     = attr.attr.max_wr;
3478         resp.max_sge    = attr.attr.max_sge;
3479         if (cmd->srq_type == IB_SRQT_XRC)
3480                 resp.srqn = srq->ext.xrc.srq_num;
3481
3482         ret = uverbs_response(attrs, &resp, sizeof(resp));
3483         if (ret)
3484                 goto err_copy;
3485
3486         if (cmd->srq_type == IB_SRQT_XRC)
3487                 uobj_put_read(xrcd_uobj);
3488
3489         if (ib_srq_has_cq(cmd->srq_type))
3490                 uobj_put_obj_read(attr.ext.cq);
3491
3492         uobj_put_obj_read(pd);
3493         return uobj_alloc_commit(&obj->uevent.uobject);
3494
3495 err_copy:
3496         ib_destroy_srq(srq);
3497
3498 err_put:
3499         uobj_put_obj_read(pd);
3500
3501 err_put_cq:
3502         if (ib_srq_has_cq(cmd->srq_type))
3503                 uobj_put_obj_read(attr.ext.cq);
3504
3505 err_put_xrcd:
3506         if (cmd->srq_type == IB_SRQT_XRC) {
3507                 atomic_dec(&obj->uxrcd->refcnt);
3508                 uobj_put_read(xrcd_uobj);
3509         }
3510
3511 err:
3512         uobj_alloc_abort(&obj->uevent.uobject);
3513         return ret;
3514 }
3515
3516 static int ib_uverbs_create_srq(struct uverbs_attr_bundle *attrs)
3517 {
3518         struct ib_uverbs_create_srq      cmd;
3519         struct ib_uverbs_create_xsrq     xcmd;
3520         int ret;
3521
3522         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3523         if (ret)
3524                 return ret;
3525
3526         memset(&xcmd, 0, sizeof(xcmd));
3527         xcmd.response    = cmd.response;
3528         xcmd.user_handle = cmd.user_handle;
3529         xcmd.srq_type    = IB_SRQT_BASIC;
3530         xcmd.pd_handle   = cmd.pd_handle;
3531         xcmd.max_wr      = cmd.max_wr;
3532         xcmd.max_sge     = cmd.max_sge;
3533         xcmd.srq_limit   = cmd.srq_limit;
3534
3535         return __uverbs_create_xsrq(attrs, &xcmd, &attrs->driver_udata);
3536 }
3537
3538 static int ib_uverbs_create_xsrq(struct uverbs_attr_bundle *attrs)
3539 {
3540         struct ib_uverbs_create_xsrq     cmd;
3541         int ret;
3542
3543         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3544         if (ret)
3545                 return ret;
3546
3547         return __uverbs_create_xsrq(attrs, &cmd, &attrs->driver_udata);
3548 }
3549
3550 static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs)
3551 {
3552         struct ib_uverbs_modify_srq cmd;
3553         struct ib_srq              *srq;
3554         struct ib_srq_attr          attr;
3555         int                         ret;
3556
3557         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3558         if (ret)
3559                 return ret;
3560
3561         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3562         if (!srq)
3563                 return -EINVAL;
3564
3565         attr.max_wr    = cmd.max_wr;
3566         attr.srq_limit = cmd.srq_limit;
3567
3568         ret = srq->device->ops.modify_srq(srq, &attr, cmd.attr_mask,
3569                                           &attrs->driver_udata);
3570
3571         uobj_put_obj_read(srq);
3572
3573         return ret;
3574 }
3575
3576 static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs)
3577 {
3578         struct ib_uverbs_query_srq      cmd;
3579         struct ib_uverbs_query_srq_resp resp;
3580         struct ib_srq_attr              attr;
3581         struct ib_srq                   *srq;
3582         int                             ret;
3583
3584         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3585         if (ret)
3586                 return ret;
3587
3588         srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3589         if (!srq)
3590                 return -EINVAL;
3591
3592         ret = ib_query_srq(srq, &attr);
3593
3594         uobj_put_obj_read(srq);
3595
3596         if (ret)
3597                 return ret;
3598
3599         memset(&resp, 0, sizeof resp);
3600
3601         resp.max_wr    = attr.max_wr;
3602         resp.max_sge   = attr.max_sge;
3603         resp.srq_limit = attr.srq_limit;
3604
3605         return uverbs_response(attrs, &resp, sizeof(resp));
3606 }
3607
3608 static int ib_uverbs_destroy_srq(struct uverbs_attr_bundle *attrs)
3609 {
3610         struct ib_uverbs_destroy_srq      cmd;
3611         struct ib_uverbs_destroy_srq_resp resp;
3612         struct ib_uobject                *uobj;
3613         struct ib_uevent_object          *obj;
3614         int ret;
3615
3616         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3617         if (ret)
3618                 return ret;
3619
3620         uobj = uobj_get_destroy(UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs);
3621         if (IS_ERR(uobj))
3622                 return PTR_ERR(uobj);
3623
3624         obj = container_of(uobj, struct ib_uevent_object, uobject);
3625         memset(&resp, 0, sizeof(resp));
3626         resp.events_reported = obj->events_reported;
3627
3628         uobj_put_destroy(uobj);
3629
3630         return uverbs_response(attrs, &resp, sizeof(resp));
3631 }
3632
3633 static int ib_uverbs_ex_query_device(struct uverbs_attr_bundle *attrs)
3634 {
3635         struct ib_uverbs_ex_query_device_resp resp = {};
3636         struct ib_uverbs_ex_query_device  cmd;
3637         struct ib_device_attr attr = {0};
3638         struct ib_ucontext *ucontext;
3639         struct ib_device *ib_dev;
3640         int err;
3641
3642         ucontext = ib_uverbs_get_ucontext(attrs);
3643         if (IS_ERR(ucontext))
3644                 return PTR_ERR(ucontext);
3645         ib_dev = ucontext->device;
3646
3647         err = uverbs_request(attrs, &cmd, sizeof(cmd));
3648         if (err)
3649                 return err;
3650
3651         if (cmd.comp_mask)
3652                 return -EINVAL;
3653
3654         if (cmd.reserved)
3655                 return -EINVAL;
3656
3657         err = ib_dev->ops.query_device(ib_dev, &attr, &attrs->driver_udata);
3658         if (err)
3659                 return err;
3660
3661         copy_query_dev_fields(ucontext, &resp.base, &attr);
3662
3663 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3664         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3665         resp.odp_caps.per_transport_caps.rc_odp_caps =
3666                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3667         resp.odp_caps.per_transport_caps.uc_odp_caps =
3668                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3669         resp.odp_caps.per_transport_caps.ud_odp_caps =
3670                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3671 #endif
3672
3673         resp.timestamp_mask = attr.timestamp_mask;
3674         resp.hca_core_clock = attr.hca_core_clock;
3675         resp.device_cap_flags_ex = attr.device_cap_flags;
3676         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3677         resp.rss_caps.max_rwq_indirection_tables =
3678                 attr.rss_caps.max_rwq_indirection_tables;
3679         resp.rss_caps.max_rwq_indirection_table_size =
3680                 attr.rss_caps.max_rwq_indirection_table_size;
3681         resp.max_wq_type_rq = attr.max_wq_type_rq;
3682         resp.raw_packet_caps = attr.raw_packet_caps;
3683         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3684         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3685         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3686         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3687         resp.tm_caps.flags              = attr.tm_caps.flags;
3688         resp.cq_moderation_caps.max_cq_moderation_count  =
3689                 attr.cq_caps.max_cq_moderation_count;
3690         resp.cq_moderation_caps.max_cq_moderation_period =
3691                 attr.cq_caps.max_cq_moderation_period;
3692         resp.max_dm_size = attr.max_dm_size;
3693         resp.response_length = uverbs_response_length(attrs, sizeof(resp));
3694
3695         return uverbs_response(attrs, &resp, sizeof(resp));
3696 }
3697
3698 static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs)
3699 {
3700         struct ib_uverbs_ex_modify_cq cmd;
3701         struct ib_cq *cq;
3702         int ret;
3703
3704         ret = uverbs_request(attrs, &cmd, sizeof(cmd));
3705         if (ret)
3706                 return ret;
3707
3708         if (!cmd.attr_mask || cmd.reserved)
3709                 return -EINVAL;
3710
3711         if (cmd.attr_mask > IB_CQ_MODERATE)
3712                 return -EOPNOTSUPP;
3713
3714         cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs);
3715         if (!cq)
3716                 return -EINVAL;
3717
3718         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3719
3720         uobj_put_obj_read(cq);
3721
3722         return ret;
3723 }
3724
3725 /*
3726  * Describe the input structs for write(). Some write methods have an input
3727  * only struct, most have an input and output. If the struct has an output then
3728  * the 'response' u64 must be the first field in the request structure.
3729  *
3730  * If udata is present then both the request and response structs have a
3731  * trailing driver_data flex array. In this case the size of the base struct
3732  * cannot be changed.
3733  */
3734 #define offsetof_after(_struct, _member)                                       \
3735         (offsetof(_struct, _member) + sizeof(((_struct *)NULL)->_member))
3736
3737 #define UAPI_DEF_WRITE_IO(req, resp)                                           \
3738         .write.has_resp = 1 +                                                  \
3739                           BUILD_BUG_ON_ZERO(offsetof(req, response) != 0) +    \
3740                           BUILD_BUG_ON_ZERO(sizeof(((req *)0)->response) !=    \
3741                                             sizeof(u64)),                      \
3742         .write.req_size = sizeof(req), .write.resp_size = sizeof(resp)
3743
3744 #define UAPI_DEF_WRITE_I(req) .write.req_size = sizeof(req)
3745
3746 #define UAPI_DEF_WRITE_UDATA_IO(req, resp)                                     \
3747         UAPI_DEF_WRITE_IO(req, resp),                                          \
3748                 .write.has_udata =                                             \
3749                         1 +                                                    \
3750                         BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=        \
3751                                           sizeof(req)) +                       \
3752                         BUILD_BUG_ON_ZERO(offsetof(resp, driver_data) !=       \
3753                                           sizeof(resp))
3754
3755 #define UAPI_DEF_WRITE_UDATA_I(req)                                            \
3756         UAPI_DEF_WRITE_I(req),                                                 \
3757                 .write.has_udata =                                             \
3758                         1 + BUILD_BUG_ON_ZERO(offsetof(req, driver_data) !=    \
3759                                               sizeof(req))
3760
3761 /*
3762  * The _EX versions are for use with WRITE_EX and allow the last struct member
3763  * to be specified. Buffers that do not include that member will be rejected.
3764  */
3765 #define UAPI_DEF_WRITE_IO_EX(req, req_last_member, resp, resp_last_member)     \
3766         .write.has_resp = 1,                                                   \
3767         .write.req_size = offsetof_after(req, req_last_member),                \
3768         .write.resp_size = offsetof_after(resp, resp_last_member)
3769
3770 #define UAPI_DEF_WRITE_I_EX(req, req_last_member)                              \
3771         .write.req_size = offsetof_after(req, req_last_member)
3772
3773 const struct uapi_definition uverbs_def_write_intf[] = {
3774         DECLARE_UVERBS_OBJECT(
3775                 UVERBS_OBJECT_AH,
3776                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_AH,
3777                                      ib_uverbs_create_ah,
3778                                      UAPI_DEF_WRITE_UDATA_IO(
3779                                              struct ib_uverbs_create_ah,
3780                                              struct ib_uverbs_create_ah_resp),
3781                                      UAPI_DEF_METHOD_NEEDS_FN(create_ah)),
3782                 DECLARE_UVERBS_WRITE(
3783                         IB_USER_VERBS_CMD_DESTROY_AH,
3784                         ib_uverbs_destroy_ah,
3785                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_ah),
3786                         UAPI_DEF_METHOD_NEEDS_FN(destroy_ah))),
3787
3788         DECLARE_UVERBS_OBJECT(
3789                 UVERBS_OBJECT_COMP_CHANNEL,
3790                 DECLARE_UVERBS_WRITE(
3791                         IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL,
3792                         ib_uverbs_create_comp_channel,
3793                         UAPI_DEF_WRITE_IO(
3794                                 struct ib_uverbs_create_comp_channel,
3795                                 struct ib_uverbs_create_comp_channel_resp))),
3796
3797         DECLARE_UVERBS_OBJECT(
3798                 UVERBS_OBJECT_CQ,
3799                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_CQ,
3800                                      ib_uverbs_create_cq,
3801                                      UAPI_DEF_WRITE_UDATA_IO(
3802                                              struct ib_uverbs_create_cq,
3803                                              struct ib_uverbs_create_cq_resp),
3804                                      UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3805                 DECLARE_UVERBS_WRITE(
3806                         IB_USER_VERBS_CMD_DESTROY_CQ,
3807                         ib_uverbs_destroy_cq,
3808                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_cq,
3809                                           struct ib_uverbs_destroy_cq_resp),
3810                         UAPI_DEF_METHOD_NEEDS_FN(destroy_cq)),
3811                 DECLARE_UVERBS_WRITE(
3812                         IB_USER_VERBS_CMD_POLL_CQ,
3813                         ib_uverbs_poll_cq,
3814                         UAPI_DEF_WRITE_IO(struct ib_uverbs_poll_cq,
3815                                           struct ib_uverbs_poll_cq_resp),
3816                         UAPI_DEF_METHOD_NEEDS_FN(poll_cq)),
3817                 DECLARE_UVERBS_WRITE(
3818                         IB_USER_VERBS_CMD_REQ_NOTIFY_CQ,
3819                         ib_uverbs_req_notify_cq,
3820                         UAPI_DEF_WRITE_I(struct ib_uverbs_req_notify_cq),
3821                         UAPI_DEF_METHOD_NEEDS_FN(req_notify_cq)),
3822                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_RESIZE_CQ,
3823                                      ib_uverbs_resize_cq,
3824                                      UAPI_DEF_WRITE_UDATA_IO(
3825                                              struct ib_uverbs_resize_cq,
3826                                              struct ib_uverbs_resize_cq_resp),
3827                                      UAPI_DEF_METHOD_NEEDS_FN(resize_cq)),
3828                 DECLARE_UVERBS_WRITE_EX(
3829                         IB_USER_VERBS_EX_CMD_CREATE_CQ,
3830                         ib_uverbs_ex_create_cq,
3831                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_cq,
3832                                              reserved,
3833                                              struct ib_uverbs_ex_create_cq_resp,
3834                                              response_length),
3835                         UAPI_DEF_METHOD_NEEDS_FN(create_cq)),
3836                 DECLARE_UVERBS_WRITE_EX(
3837                         IB_USER_VERBS_EX_CMD_MODIFY_CQ,
3838                         ib_uverbs_ex_modify_cq,
3839                         UAPI_DEF_WRITE_I(struct ib_uverbs_ex_modify_cq),
3840                         UAPI_DEF_METHOD_NEEDS_FN(create_cq))),
3841
3842         DECLARE_UVERBS_OBJECT(
3843                 UVERBS_OBJECT_DEVICE,
3844                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_GET_CONTEXT,
3845                                      ib_uverbs_get_context,
3846                                      UAPI_DEF_WRITE_UDATA_IO(
3847                                              struct ib_uverbs_get_context,
3848                                              struct ib_uverbs_get_context_resp)),
3849                 DECLARE_UVERBS_WRITE(
3850                         IB_USER_VERBS_CMD_QUERY_DEVICE,
3851                         ib_uverbs_query_device,
3852                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_device,
3853                                           struct ib_uverbs_query_device_resp)),
3854                 DECLARE_UVERBS_WRITE(
3855                         IB_USER_VERBS_CMD_QUERY_PORT,
3856                         ib_uverbs_query_port,
3857                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_port,
3858                                           struct ib_uverbs_query_port_resp),
3859                         UAPI_DEF_METHOD_NEEDS_FN(query_port)),
3860                 DECLARE_UVERBS_WRITE_EX(
3861                         IB_USER_VERBS_EX_CMD_QUERY_DEVICE,
3862                         ib_uverbs_ex_query_device,
3863                         UAPI_DEF_WRITE_IO_EX(
3864                                 struct ib_uverbs_ex_query_device,
3865                                 reserved,
3866                                 struct ib_uverbs_ex_query_device_resp,
3867                                 response_length),
3868                         UAPI_DEF_METHOD_NEEDS_FN(query_device)),
3869                 UAPI_DEF_OBJ_NEEDS_FN(alloc_ucontext),
3870                 UAPI_DEF_OBJ_NEEDS_FN(dealloc_ucontext)),
3871
3872         DECLARE_UVERBS_OBJECT(
3873                 UVERBS_OBJECT_FLOW,
3874                 DECLARE_UVERBS_WRITE_EX(
3875                         IB_USER_VERBS_EX_CMD_CREATE_FLOW,
3876                         ib_uverbs_ex_create_flow,
3877                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_create_flow,
3878                                              flow_attr,
3879                                              struct ib_uverbs_create_flow_resp,
3880                                              flow_handle),
3881                         UAPI_DEF_METHOD_NEEDS_FN(create_flow)),
3882                 DECLARE_UVERBS_WRITE_EX(
3883                         IB_USER_VERBS_EX_CMD_DESTROY_FLOW,
3884                         ib_uverbs_ex_destroy_flow,
3885                         UAPI_DEF_WRITE_I(struct ib_uverbs_destroy_flow),
3886                         UAPI_DEF_METHOD_NEEDS_FN(destroy_flow))),
3887
3888         DECLARE_UVERBS_OBJECT(
3889                 UVERBS_OBJECT_MR,
3890                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_DEREG_MR,
3891                                      ib_uverbs_dereg_mr,
3892                                      UAPI_DEF_WRITE_I(struct ib_uverbs_dereg_mr),
3893                                      UAPI_DEF_METHOD_NEEDS_FN(dereg_mr)),
3894                 DECLARE_UVERBS_WRITE(
3895                         IB_USER_VERBS_CMD_REG_MR,
3896                         ib_uverbs_reg_mr,
3897                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_reg_mr,
3898                                                 struct ib_uverbs_reg_mr_resp),
3899                         UAPI_DEF_METHOD_NEEDS_FN(reg_user_mr)),
3900                 DECLARE_UVERBS_WRITE(
3901                         IB_USER_VERBS_CMD_REREG_MR,
3902                         ib_uverbs_rereg_mr,
3903                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_rereg_mr,
3904                                                 struct ib_uverbs_rereg_mr_resp),
3905                         UAPI_DEF_METHOD_NEEDS_FN(rereg_user_mr))),
3906
3907         DECLARE_UVERBS_OBJECT(
3908                 UVERBS_OBJECT_MW,
3909                 DECLARE_UVERBS_WRITE(
3910                         IB_USER_VERBS_CMD_ALLOC_MW,
3911                         ib_uverbs_alloc_mw,
3912                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_mw,
3913                                                 struct ib_uverbs_alloc_mw_resp),
3914                         UAPI_DEF_METHOD_NEEDS_FN(alloc_mw)),
3915                 DECLARE_UVERBS_WRITE(
3916                         IB_USER_VERBS_CMD_DEALLOC_MW,
3917                         ib_uverbs_dealloc_mw,
3918                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_mw),
3919                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_mw))),
3920
3921         DECLARE_UVERBS_OBJECT(
3922                 UVERBS_OBJECT_PD,
3923                 DECLARE_UVERBS_WRITE(
3924                         IB_USER_VERBS_CMD_ALLOC_PD,
3925                         ib_uverbs_alloc_pd,
3926                         UAPI_DEF_WRITE_UDATA_IO(struct ib_uverbs_alloc_pd,
3927                                                 struct ib_uverbs_alloc_pd_resp),
3928                         UAPI_DEF_METHOD_NEEDS_FN(alloc_pd)),
3929                 DECLARE_UVERBS_WRITE(
3930                         IB_USER_VERBS_CMD_DEALLOC_PD,
3931                         ib_uverbs_dealloc_pd,
3932                         UAPI_DEF_WRITE_I(struct ib_uverbs_dealloc_pd),
3933                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_pd))),
3934
3935         DECLARE_UVERBS_OBJECT(
3936                 UVERBS_OBJECT_QP,
3937                 DECLARE_UVERBS_WRITE(
3938                         IB_USER_VERBS_CMD_ATTACH_MCAST,
3939                         ib_uverbs_attach_mcast,
3940                         UAPI_DEF_WRITE_I(struct ib_uverbs_attach_mcast),
3941                         UAPI_DEF_METHOD_NEEDS_FN(attach_mcast),
3942                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3943                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_QP,
3944                                      ib_uverbs_create_qp,
3945                                      UAPI_DEF_WRITE_UDATA_IO(
3946                                              struct ib_uverbs_create_qp,
3947                                              struct ib_uverbs_create_qp_resp),
3948                                      UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3949                 DECLARE_UVERBS_WRITE(
3950                         IB_USER_VERBS_CMD_DESTROY_QP,
3951                         ib_uverbs_destroy_qp,
3952                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_qp,
3953                                           struct ib_uverbs_destroy_qp_resp),
3954                         UAPI_DEF_METHOD_NEEDS_FN(destroy_qp)),
3955                 DECLARE_UVERBS_WRITE(
3956                         IB_USER_VERBS_CMD_DETACH_MCAST,
3957                         ib_uverbs_detach_mcast,
3958                         UAPI_DEF_WRITE_I(struct ib_uverbs_detach_mcast),
3959                         UAPI_DEF_METHOD_NEEDS_FN(detach_mcast)),
3960                 DECLARE_UVERBS_WRITE(
3961                         IB_USER_VERBS_CMD_MODIFY_QP,
3962                         ib_uverbs_modify_qp,
3963                         UAPI_DEF_WRITE_I(struct ib_uverbs_modify_qp),
3964                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp)),
3965                 DECLARE_UVERBS_WRITE(
3966                         IB_USER_VERBS_CMD_POST_RECV,
3967                         ib_uverbs_post_recv,
3968                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_recv,
3969                                           struct ib_uverbs_post_recv_resp),
3970                         UAPI_DEF_METHOD_NEEDS_FN(post_recv)),
3971                 DECLARE_UVERBS_WRITE(
3972                         IB_USER_VERBS_CMD_POST_SEND,
3973                         ib_uverbs_post_send,
3974                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_send,
3975                                           struct ib_uverbs_post_send_resp),
3976                         UAPI_DEF_METHOD_NEEDS_FN(post_send)),
3977                 DECLARE_UVERBS_WRITE(
3978                         IB_USER_VERBS_CMD_QUERY_QP,
3979                         ib_uverbs_query_qp,
3980                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_qp,
3981                                           struct ib_uverbs_query_qp_resp),
3982                         UAPI_DEF_METHOD_NEEDS_FN(query_qp)),
3983                 DECLARE_UVERBS_WRITE_EX(
3984                         IB_USER_VERBS_EX_CMD_CREATE_QP,
3985                         ib_uverbs_ex_create_qp,
3986                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_qp,
3987                                              comp_mask,
3988                                              struct ib_uverbs_ex_create_qp_resp,
3989                                              response_length),
3990                         UAPI_DEF_METHOD_NEEDS_FN(create_qp)),
3991                 DECLARE_UVERBS_WRITE_EX(
3992                         IB_USER_VERBS_EX_CMD_MODIFY_QP,
3993                         ib_uverbs_ex_modify_qp,
3994                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_modify_qp,
3995                                              base,
3996                                              struct ib_uverbs_ex_modify_qp_resp,
3997                                              response_length),
3998                         UAPI_DEF_METHOD_NEEDS_FN(modify_qp))),
3999
4000         DECLARE_UVERBS_OBJECT(
4001                 UVERBS_OBJECT_RWQ_IND_TBL,
4002                 DECLARE_UVERBS_WRITE_EX(
4003                         IB_USER_VERBS_EX_CMD_CREATE_RWQ_IND_TBL,
4004                         ib_uverbs_ex_create_rwq_ind_table,
4005                         UAPI_DEF_WRITE_IO_EX(
4006                                 struct ib_uverbs_ex_create_rwq_ind_table,
4007                                 log_ind_tbl_size,
4008                                 struct ib_uverbs_ex_create_rwq_ind_table_resp,
4009                                 ind_tbl_num),
4010                         UAPI_DEF_METHOD_NEEDS_FN(create_rwq_ind_table)),
4011                 DECLARE_UVERBS_WRITE_EX(
4012                         IB_USER_VERBS_EX_CMD_DESTROY_RWQ_IND_TBL,
4013                         ib_uverbs_ex_destroy_rwq_ind_table,
4014                         UAPI_DEF_WRITE_I(
4015                                 struct ib_uverbs_ex_destroy_rwq_ind_table),
4016                         UAPI_DEF_METHOD_NEEDS_FN(destroy_rwq_ind_table))),
4017
4018         DECLARE_UVERBS_OBJECT(
4019                 UVERBS_OBJECT_WQ,
4020                 DECLARE_UVERBS_WRITE_EX(
4021                         IB_USER_VERBS_EX_CMD_CREATE_WQ,
4022                         ib_uverbs_ex_create_wq,
4023                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_create_wq,
4024                                              max_sge,
4025                                              struct ib_uverbs_ex_create_wq_resp,
4026                                              wqn),
4027                         UAPI_DEF_METHOD_NEEDS_FN(create_wq)),
4028                 DECLARE_UVERBS_WRITE_EX(
4029                         IB_USER_VERBS_EX_CMD_DESTROY_WQ,
4030                         ib_uverbs_ex_destroy_wq,
4031                         UAPI_DEF_WRITE_IO_EX(struct ib_uverbs_ex_destroy_wq,
4032                                              wq_handle,
4033                                              struct ib_uverbs_ex_destroy_wq_resp,
4034                                              reserved),
4035                         UAPI_DEF_METHOD_NEEDS_FN(destroy_wq)),
4036                 DECLARE_UVERBS_WRITE_EX(
4037                         IB_USER_VERBS_EX_CMD_MODIFY_WQ,
4038                         ib_uverbs_ex_modify_wq,
4039                         UAPI_DEF_WRITE_I_EX(struct ib_uverbs_ex_modify_wq,
4040                                             curr_wq_state),
4041                         UAPI_DEF_METHOD_NEEDS_FN(modify_wq))),
4042
4043         DECLARE_UVERBS_OBJECT(
4044                 UVERBS_OBJECT_SRQ,
4045                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_SRQ,
4046                                      ib_uverbs_create_srq,
4047                                      UAPI_DEF_WRITE_UDATA_IO(
4048                                              struct ib_uverbs_create_srq,
4049                                              struct ib_uverbs_create_srq_resp),
4050                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4051                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_CREATE_XSRQ,
4052                                      ib_uverbs_create_xsrq,
4053                                      UAPI_DEF_WRITE_UDATA_IO(
4054                                              struct ib_uverbs_create_xsrq,
4055                                              struct ib_uverbs_create_srq_resp),
4056                                      UAPI_DEF_METHOD_NEEDS_FN(create_srq)),
4057                 DECLARE_UVERBS_WRITE(
4058                         IB_USER_VERBS_CMD_DESTROY_SRQ,
4059                         ib_uverbs_destroy_srq,
4060                         UAPI_DEF_WRITE_IO(struct ib_uverbs_destroy_srq,
4061                                           struct ib_uverbs_destroy_srq_resp),
4062                         UAPI_DEF_METHOD_NEEDS_FN(destroy_srq)),
4063                 DECLARE_UVERBS_WRITE(
4064                         IB_USER_VERBS_CMD_MODIFY_SRQ,
4065                         ib_uverbs_modify_srq,
4066                         UAPI_DEF_WRITE_UDATA_I(struct ib_uverbs_modify_srq),
4067                         UAPI_DEF_METHOD_NEEDS_FN(modify_srq)),
4068                 DECLARE_UVERBS_WRITE(
4069                         IB_USER_VERBS_CMD_POST_SRQ_RECV,
4070                         ib_uverbs_post_srq_recv,
4071                         UAPI_DEF_WRITE_IO(struct ib_uverbs_post_srq_recv,
4072                                           struct ib_uverbs_post_srq_recv_resp),
4073                         UAPI_DEF_METHOD_NEEDS_FN(post_srq_recv)),
4074                 DECLARE_UVERBS_WRITE(
4075                         IB_USER_VERBS_CMD_QUERY_SRQ,
4076                         ib_uverbs_query_srq,
4077                         UAPI_DEF_WRITE_IO(struct ib_uverbs_query_srq,
4078                                           struct ib_uverbs_query_srq_resp),
4079                         UAPI_DEF_METHOD_NEEDS_FN(query_srq))),
4080
4081         DECLARE_UVERBS_OBJECT(
4082                 UVERBS_OBJECT_XRCD,
4083                 DECLARE_UVERBS_WRITE(
4084                         IB_USER_VERBS_CMD_CLOSE_XRCD,
4085                         ib_uverbs_close_xrcd,
4086                         UAPI_DEF_WRITE_I(struct ib_uverbs_close_xrcd),
4087                         UAPI_DEF_METHOD_NEEDS_FN(dealloc_xrcd)),
4088                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_QP,
4089                                      ib_uverbs_open_qp,
4090                                      UAPI_DEF_WRITE_UDATA_IO(
4091                                              struct ib_uverbs_open_qp,
4092                                              struct ib_uverbs_create_qp_resp)),
4093                 DECLARE_UVERBS_WRITE(IB_USER_VERBS_CMD_OPEN_XRCD,
4094                                      ib_uverbs_open_xrcd,
4095                                      UAPI_DEF_WRITE_UDATA_IO(
4096                                              struct ib_uverbs_open_xrcd,
4097                                              struct ib_uverbs_open_xrcd_resp),
4098                                      UAPI_DEF_METHOD_NEEDS_FN(alloc_xrcd))),
4099
4100         {},
4101 };