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 static struct ib_uverbs_completion_event_file *
  51 ib_uverbs_lookup_comp_file(int fd, struct ib_ucontext *context)
  52 {
  53         struct ib_uobject *uobj = uobj_get_read(uobj_get_type(comp_channel),
  54                                                 fd, context);
  55         struct ib_uobject_file *uobj_file;
  56
  57         if (IS_ERR(uobj))
  58                 return (void *)uobj;
  59
  60         uverbs_uobject_get(uobj);
  61         uobj_put_read(uobj);
  62
  63         uobj_file = container_of(uobj, struct ib_uobject_file, uobj);
  64         return container_of(uobj_file, struct ib_uverbs_completion_event_file,
  65                             uobj_file);
  66 }
  67
  68 ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
  69                               struct ib_device *ib_dev,
  70                               const char __user *buf,
  71                               int in_len, int out_len)
  72 {
  73         struct ib_uverbs_get_context      cmd;
  74         struct ib_uverbs_get_context_resp resp;
  75         struct ib_udata                   udata;
  76         struct ib_ucontext               *ucontext;
  77         struct file                      *filp;
  78         struct ib_rdmacg_object          cg_obj;
  79         int ret;
  80
  81         if (out_len < sizeof resp)
  82                 return -ENOSPC;
  83
  84         if (copy_from_user(&cmd, buf, sizeof cmd))
  85                 return -EFAULT;
  86
  87         mutex_lock(&file->mutex);
  88
  89         if (file->ucontext) {
  90                 ret = -EINVAL;
  91                 goto err;
  92         }
  93
  94         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
  95                    u64_to_user_ptr(cmd.response) + sizeof(resp),
  96                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
  97                    out_len - sizeof(resp));
  98
  99         ret = ib_rdmacg_try_charge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 100         if (ret)
 101                 goto err;
 102
 103         ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
 104         if (IS_ERR(ucontext)) {
 105                 ret = PTR_ERR(ucontext);
 106                 goto err_alloc;
 107         }
 108
 109         ucontext->device = ib_dev;
 110         ucontext->cg_obj = cg_obj;
 111         /* ufile is required when some objects are released */
 112         ucontext->ufile = file;
 113         uverbs_initialize_ucontext(ucontext);
 114
 115         rcu_read_lock();
 116         ucontext->tgid = get_task_pid(current->group_leader, PIDTYPE_PID);
 117         rcu_read_unlock();
 118         ucontext->closing = 0;
 119
 120 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
 121         ucontext->umem_tree = RB_ROOT_CACHED;
 122         init_rwsem(&ucontext->umem_rwsem);
 123         ucontext->odp_mrs_count = 0;
 124         INIT_LIST_HEAD(&ucontext->no_private_counters);
 125
 126         if (!(ib_dev->attrs.device_cap_flags & IB_DEVICE_ON_DEMAND_PAGING))
 127                 ucontext->invalidate_range = NULL;
 128
 129 #endif
 130
 131         resp.num_comp_vectors = file->device->num_comp_vectors;
 132
 133         ret = get_unused_fd_flags(O_CLOEXEC);
 134         if (ret < 0)
 135                 goto err_free;
 136         resp.async_fd = ret;
 137
 138         filp = ib_uverbs_alloc_async_event_file(file, ib_dev);
 139         if (IS_ERR(filp)) {
 140                 ret = PTR_ERR(filp);
 141                 goto err_fd;
 142         }
 143
 144         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 145                 ret = -EFAULT;
 146                 goto err_file;
 147         }
 148
 149         file->ucontext = ucontext;
 150
 151         fd_install(resp.async_fd, filp);
 152
 153         mutex_unlock(&file->mutex);
 154
 155         return in_len;
 156
 157 err_file:
 158         ib_uverbs_free_async_event_file(file);
 159         fput(filp);
 160
 161 err_fd:
 162         put_unused_fd(resp.async_fd);
 163
 164 err_free:
 165         put_pid(ucontext->tgid);
 166         ib_dev->dealloc_ucontext(ucontext);
 167
 168 err_alloc:
 169         ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMACG_RESOURCE_HCA_HANDLE);
 170
 171 err:
 172         mutex_unlock(&file->mutex);
 173         return ret;
 174 }
 175
 176 static void copy_query_dev_fields(struct ib_uverbs_file *file,
 177                                   struct ib_device *ib_dev,
 178                                   struct ib_uverbs_query_device_resp *resp,
 179                                   struct ib_device_attr *attr)
 180 {
 181         resp->fw_ver            = attr->fw_ver;
 182         resp->node_guid         = ib_dev->node_guid;
 183         resp->sys_image_guid    = attr->sys_image_guid;
 184         resp->max_mr_size       = attr->max_mr_size;
 185         resp->page_size_cap     = attr->page_size_cap;
 186         resp->vendor_id         = attr->vendor_id;
 187         resp->vendor_part_id    = attr->vendor_part_id;
 188         resp->hw_ver            = attr->hw_ver;
 189         resp->max_qp            = attr->max_qp;
 190         resp->max_qp_wr         = attr->max_qp_wr;
 191         resp->device_cap_flags  = lower_32_bits(attr->device_cap_flags);
 192         resp->max_sge           = attr->max_sge;
 193         resp->max_sge_rd        = attr->max_sge_rd;
 194         resp->max_cq            = attr->max_cq;
 195         resp->max_cqe           = attr->max_cqe;
 196         resp->max_mr            = attr->max_mr;
 197         resp->max_pd            = attr->max_pd;
 198         resp->max_qp_rd_atom    = attr->max_qp_rd_atom;
 199         resp->max_ee_rd_atom    = attr->max_ee_rd_atom;
 200         resp->max_res_rd_atom   = attr->max_res_rd_atom;
 201         resp->max_qp_init_rd_atom       = attr->max_qp_init_rd_atom;
 202         resp->max_ee_init_rd_atom       = attr->max_ee_init_rd_atom;
 203         resp->atomic_cap                = attr->atomic_cap;
 204         resp->max_ee                    = attr->max_ee;
 205         resp->max_rdd                   = attr->max_rdd;
 206         resp->max_mw                    = attr->max_mw;
 207         resp->max_raw_ipv6_qp           = attr->max_raw_ipv6_qp;
 208         resp->max_raw_ethy_qp           = attr->max_raw_ethy_qp;
 209         resp->max_mcast_grp             = attr->max_mcast_grp;
 210         resp->max_mcast_qp_attach       = attr->max_mcast_qp_attach;
 211         resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
 212         resp->max_ah                    = attr->max_ah;
 213         resp->max_fmr                   = attr->max_fmr;
 214         resp->max_map_per_fmr           = attr->max_map_per_fmr;
 215         resp->max_srq                   = attr->max_srq;
 216         resp->max_srq_wr                = attr->max_srq_wr;
 217         resp->max_srq_sge               = attr->max_srq_sge;
 218         resp->max_pkeys                 = attr->max_pkeys;
 219         resp->local_ca_ack_delay        = attr->local_ca_ack_delay;
 220         resp->phys_port_cnt             = ib_dev->phys_port_cnt;
 221 }
 222
 223 ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 224                                struct ib_device *ib_dev,
 225                                const char __user *buf,
 226                                int in_len, int out_len)
 227 {
 228         struct ib_uverbs_query_device      cmd;
 229         struct ib_uverbs_query_device_resp resp;
 230
 231         if (out_len < sizeof resp)
 232                 return -ENOSPC;
 233
 234         if (copy_from_user(&cmd, buf, sizeof cmd))
 235                 return -EFAULT;
 236
 237         memset(&resp, 0, sizeof resp);
 238         copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
 239
 240         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
 241                 return -EFAULT;
 242
 243         return in_len;
 244 }
 245
 246 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 247                              struct ib_device *ib_dev,
 248                              const char __user *buf,
 249                              int in_len, int out_len)
 250 {
 251         struct ib_uverbs_query_port      cmd;
 252         struct ib_uverbs_query_port_resp resp;
 253         struct ib_port_attr              attr;
 254         int                              ret;
 255
 256         if (out_len < sizeof resp)
 257                 return -ENOSPC;
 258
 259         if (copy_from_user(&cmd, buf, sizeof cmd))
 260                 return -EFAULT;
 261
 262         ret = ib_query_port(ib_dev, cmd.port_num, &attr);
 263         if (ret)
 264                 return ret;
 265
 266         memset(&resp, 0, sizeof resp);
 267
 268         resp.state           = attr.state;
 269         resp.max_mtu         = attr.max_mtu;
 270         resp.active_mtu      = attr.active_mtu;
 271         resp.gid_tbl_len     = attr.gid_tbl_len;
 272         resp.port_cap_flags  = attr.port_cap_flags;
 273         resp.max_msg_sz      = attr.max_msg_sz;
 274         resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 275         resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
 276         resp.pkey_tbl_len    = attr.pkey_tbl_len;
 277
 278         if (rdma_cap_opa_ah(ib_dev, cmd.port_num)) {
 279                 resp.lid     = OPA_TO_IB_UCAST_LID(attr.lid);
 280                 resp.sm_lid  = OPA_TO_IB_UCAST_LID(attr.sm_lid);
 281         } else {
 282                 resp.lid     = ib_lid_cpu16(attr.lid);
 283                 resp.sm_lid  = ib_lid_cpu16(attr.sm_lid);
 284         }
 285         resp.lmc             = attr.lmc;
 286         resp.max_vl_num      = attr.max_vl_num;
 287         resp.sm_sl           = attr.sm_sl;
 288         resp.subnet_timeout  = attr.subnet_timeout;
 289         resp.init_type_reply = attr.init_type_reply;
 290         resp.active_width    = attr.active_width;
 291         resp.active_speed    = attr.active_speed;
 292         resp.phys_state      = attr.phys_state;
 293         resp.link_layer      = rdma_port_get_link_layer(ib_dev,
 294                                                         cmd.port_num);
 295
 296         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
 297                 return -EFAULT;
 298
 299         return in_len;
 300 }
 301
 302 ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
 303                            struct ib_device *ib_dev,
 304                            const char __user *buf,
 305                            int in_len, int out_len)
 306 {
 307         struct ib_uverbs_alloc_pd      cmd;
 308         struct ib_uverbs_alloc_pd_resp resp;
 309         struct ib_udata                udata;
 310         struct ib_uobject             *uobj;
 311         struct ib_pd                  *pd;
 312         int                            ret;
 313
 314         if (out_len < sizeof resp)
 315                 return -ENOSPC;
 316
 317         if (copy_from_user(&cmd, buf, sizeof cmd))
 318                 return -EFAULT;
 319
 320         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 321                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 322                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 323                    out_len - sizeof(resp));
 324
 325         uobj  = uobj_alloc(uobj_get_type(pd), file->ucontext);
 326         if (IS_ERR(uobj))
 327                 return PTR_ERR(uobj);
 328
 329         pd = ib_dev->alloc_pd(ib_dev, file->ucontext, &udata);
 330         if (IS_ERR(pd)) {
 331                 ret = PTR_ERR(pd);
 332                 goto err;
 333         }
 334
 335         pd->device  = ib_dev;
 336         pd->uobject = uobj;
 337         pd->__internal_mr = NULL;
 338         atomic_set(&pd->usecnt, 0);
 339
 340         uobj->object = pd;
 341         memset(&resp, 0, sizeof resp);
 342         resp.pd_handle = uobj->id;
 343
 344         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 345                 ret = -EFAULT;
 346                 goto err_copy;
 347         }
 348
 349         uobj_alloc_commit(uobj);
 350
 351         return in_len;
 352
 353 err_copy:
 354         ib_dealloc_pd(pd);
 355
 356 err:
 357         uobj_alloc_abort(uobj);
 358         return ret;
 359 }
 360
 361 ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
 362                              struct ib_device *ib_dev,
 363                              const char __user *buf,
 364                              int in_len, int out_len)
 365 {
 366         struct ib_uverbs_dealloc_pd cmd;
 367         struct ib_uobject          *uobj;
 368         int                         ret;
 369
 370         if (copy_from_user(&cmd, buf, sizeof cmd))
 371                 return -EFAULT;
 372
 373         uobj  = uobj_get_write(uobj_get_type(pd), cmd.pd_handle,
 374                                file->ucontext);
 375         if (IS_ERR(uobj))
 376                 return PTR_ERR(uobj);
 377
 378         ret = uobj_remove_commit(uobj);
 379
 380         return ret ?: in_len;
 381 }
 382
 383 struct xrcd_table_entry {
 384         struct rb_node  node;
 385         struct ib_xrcd *xrcd;
 386         struct inode   *inode;
 387 };
 388
 389 static int xrcd_table_insert(struct ib_uverbs_device *dev,
 390                             struct inode *inode,
 391                             struct ib_xrcd *xrcd)
 392 {
 393         struct xrcd_table_entry *entry, *scan;
 394         struct rb_node **p = &dev->xrcd_tree.rb_node;
 395         struct rb_node *parent = NULL;
 396
 397         entry = kmalloc(sizeof *entry, GFP_KERNEL);
 398         if (!entry)
 399                 return -ENOMEM;
 400
 401         entry->xrcd  = xrcd;
 402         entry->inode = inode;
 403
 404         while (*p) {
 405                 parent = *p;
 406                 scan = rb_entry(parent, struct xrcd_table_entry, node);
 407
 408                 if (inode < scan->inode) {
 409                         p = &(*p)->rb_left;
 410                 } else if (inode > scan->inode) {
 411                         p = &(*p)->rb_right;
 412                 } else {
 413                         kfree(entry);
 414                         return -EEXIST;
 415                 }
 416         }
 417
 418         rb_link_node(&entry->node, parent, p);
 419         rb_insert_color(&entry->node, &dev->xrcd_tree);
 420         igrab(inode);
 421         return 0;
 422 }
 423
 424 static struct xrcd_table_entry *xrcd_table_search(struct ib_uverbs_device *dev,
 425                                                   struct inode *inode)
 426 {
 427         struct xrcd_table_entry *entry;
 428         struct rb_node *p = dev->xrcd_tree.rb_node;
 429
 430         while (p) {
 431                 entry = rb_entry(p, struct xrcd_table_entry, node);
 432
 433                 if (inode < entry->inode)
 434                         p = p->rb_left;
 435                 else if (inode > entry->inode)
 436                         p = p->rb_right;
 437                 else
 438                         return entry;
 439         }
 440
 441         return NULL;
 442 }
 443
 444 static struct ib_xrcd *find_xrcd(struct ib_uverbs_device *dev, struct inode *inode)
 445 {
 446         struct xrcd_table_entry *entry;
 447
 448         entry = xrcd_table_search(dev, inode);
 449         if (!entry)
 450                 return NULL;
 451
 452         return entry->xrcd;
 453 }
 454
 455 static void xrcd_table_delete(struct ib_uverbs_device *dev,
 456                               struct inode *inode)
 457 {
 458         struct xrcd_table_entry *entry;
 459
 460         entry = xrcd_table_search(dev, inode);
 461         if (entry) {
 462                 iput(inode);
 463                 rb_erase(&entry->node, &dev->xrcd_tree);
 464                 kfree(entry);
 465         }
 466 }
 467
 468 ssize_t ib_uverbs_open_xrcd(struct ib_uverbs_file *file,
 469                             struct ib_device *ib_dev,
 470                             const char __user *buf, int in_len,
 471                             int out_len)
 472 {
 473         struct ib_uverbs_open_xrcd      cmd;
 474         struct ib_uverbs_open_xrcd_resp resp;
 475         struct ib_udata                 udata;
 476         struct ib_uxrcd_object         *obj;
 477         struct ib_xrcd                 *xrcd = NULL;
 478         struct fd                       f = {NULL, 0};
 479         struct inode                   *inode = NULL;
 480         int                             ret = 0;
 481         int                             new_xrcd = 0;
 482
 483         if (out_len < sizeof resp)
 484                 return -ENOSPC;
 485
 486         if (copy_from_user(&cmd, buf, sizeof cmd))
 487                 return -EFAULT;
 488
 489         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 490                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 491                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 492                    out_len - sizeof(resp));
 493
 494         mutex_lock(&file->device->xrcd_tree_mutex);
 495
 496         if (cmd.fd != -1) {
 497                 /* search for file descriptor */
 498                 f = fdget(cmd.fd);
 499                 if (!f.file) {
 500                         ret = -EBADF;
 501                         goto err_tree_mutex_unlock;
 502                 }
 503
 504                 inode = file_inode(f.file);
 505                 xrcd = find_xrcd(file->device, inode);
 506                 if (!xrcd && !(cmd.oflags & O_CREAT)) {
 507                         /* no file descriptor. Need CREATE flag */
 508                         ret = -EAGAIN;
 509                         goto err_tree_mutex_unlock;
 510                 }
 511
 512                 if (xrcd && cmd.oflags & O_EXCL) {
 513                         ret = -EINVAL;
 514                         goto err_tree_mutex_unlock;
 515                 }
 516         }
 517
 518         obj  = (struct ib_uxrcd_object *)uobj_alloc(uobj_get_type(xrcd),
 519                                                     file->ucontext);
 520         if (IS_ERR(obj)) {
 521                 ret = PTR_ERR(obj);
 522                 goto err_tree_mutex_unlock;
 523         }
 524
 525         if (!xrcd) {
 526                 xrcd = ib_dev->alloc_xrcd(ib_dev, file->ucontext, &udata);
 527                 if (IS_ERR(xrcd)) {
 528                         ret = PTR_ERR(xrcd);
 529                         goto err;
 530                 }
 531
 532                 xrcd->inode   = inode;
 533                 xrcd->device  = ib_dev;
 534                 atomic_set(&xrcd->usecnt, 0);
 535                 mutex_init(&xrcd->tgt_qp_mutex);
 536                 INIT_LIST_HEAD(&xrcd->tgt_qp_list);
 537                 new_xrcd = 1;
 538         }
 539
 540         atomic_set(&obj->refcnt, 0);
 541         obj->uobject.object = xrcd;
 542         memset(&resp, 0, sizeof resp);
 543         resp.xrcd_handle = obj->uobject.id;
 544
 545         if (inode) {
 546                 if (new_xrcd) {
 547                         /* create new inode/xrcd table entry */
 548                         ret = xrcd_table_insert(file->device, inode, xrcd);
 549                         if (ret)
 550                                 goto err_dealloc_xrcd;
 551                 }
 552                 atomic_inc(&xrcd->usecnt);
 553         }
 554
 555         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 556                 ret = -EFAULT;
 557                 goto err_copy;
 558         }
 559
 560         if (f.file)
 561                 fdput(f);
 562
 563         uobj_alloc_commit(&obj->uobject);
 564
 565         mutex_unlock(&file->device->xrcd_tree_mutex);
 566         return in_len;
 567
 568 err_copy:
 569         if (inode) {
 570                 if (new_xrcd)
 571                         xrcd_table_delete(file->device, inode);
 572                 atomic_dec(&xrcd->usecnt);
 573         }
 574
 575 err_dealloc_xrcd:
 576         ib_dealloc_xrcd(xrcd);
 577
 578 err:
 579         uobj_alloc_abort(&obj->uobject);
 580
 581 err_tree_mutex_unlock:
 582         if (f.file)
 583                 fdput(f);
 584
 585         mutex_unlock(&file->device->xrcd_tree_mutex);
 586
 587         return ret;
 588 }
 589
 590 ssize_t ib_uverbs_close_xrcd(struct ib_uverbs_file *file,
 591                              struct ib_device *ib_dev,
 592                              const char __user *buf, int in_len,
 593                              int out_len)
 594 {
 595         struct ib_uverbs_close_xrcd cmd;
 596         struct ib_uobject           *uobj;
 597         int                         ret = 0;
 598
 599         if (copy_from_user(&cmd, buf, sizeof cmd))
 600                 return -EFAULT;
 601
 602         uobj  = uobj_get_write(uobj_get_type(xrcd), cmd.xrcd_handle,
 603                                file->ucontext);
 604         if (IS_ERR(uobj)) {
 605                 mutex_unlock(&file->device->xrcd_tree_mutex);
 606                 return PTR_ERR(uobj);
 607         }
 608
 609         ret = uobj_remove_commit(uobj);
 610         return ret ?: in_len;
 611 }
 612
 613 int ib_uverbs_dealloc_xrcd(struct ib_uverbs_device *dev,
 614                            struct ib_xrcd *xrcd,
 615                            enum rdma_remove_reason why)
 616 {
 617         struct inode *inode;
 618         int ret;
 619
 620         inode = xrcd->inode;
 621         if (inode && !atomic_dec_and_test(&xrcd->usecnt))
 622                 return 0;
 623
 624         ret = ib_dealloc_xrcd(xrcd);
 625
 626         if (why == RDMA_REMOVE_DESTROY && ret)
 627                 atomic_inc(&xrcd->usecnt);
 628         else if (inode)
 629                 xrcd_table_delete(dev, inode);
 630
 631         return ret;
 632 }
 633
 634 ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
 635                          struct ib_device *ib_dev,
 636                          const char __user *buf, int in_len,
 637                          int out_len)
 638 {
 639         struct ib_uverbs_reg_mr      cmd;
 640         struct ib_uverbs_reg_mr_resp resp;
 641         struct ib_udata              udata;
 642         struct ib_uobject           *uobj;
 643         struct ib_pd                *pd;
 644         struct ib_mr                *mr;
 645         int                          ret;
 646
 647         if (out_len < sizeof resp)
 648                 return -ENOSPC;
 649
 650         if (copy_from_user(&cmd, buf, sizeof cmd))
 651                 return -EFAULT;
 652
 653         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 654                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 655                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 656                    out_len - sizeof(resp));
 657
 658         if ((cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK))
 659                 return -EINVAL;
 660
 661         ret = ib_check_mr_access(cmd.access_flags);
 662         if (ret)
 663                 return ret;
 664
 665         uobj  = uobj_alloc(uobj_get_type(mr), file->ucontext);
 666         if (IS_ERR(uobj))
 667                 return PTR_ERR(uobj);
 668
 669         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 670         if (!pd) {
 671                 ret = -EINVAL;
 672                 goto err_free;
 673         }
 674
 675         if (cmd.access_flags & IB_ACCESS_ON_DEMAND) {
 676                 if (!(pd->device->attrs.device_cap_flags &
 677                       IB_DEVICE_ON_DEMAND_PAGING)) {
 678                         pr_debug("ODP support not available\n");
 679                         ret = -EINVAL;
 680                         goto err_put;
 681                 }
 682         }
 683
 684         mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
 685                                      cmd.access_flags, &udata);
 686         if (IS_ERR(mr)) {
 687                 ret = PTR_ERR(mr);
 688                 goto err_put;
 689         }
 690
 691         mr->device  = pd->device;
 692         mr->pd      = pd;
 693         mr->uobject = uobj;
 694         atomic_inc(&pd->usecnt);
 695
 696         uobj->object = mr;
 697
 698         memset(&resp, 0, sizeof resp);
 699         resp.lkey      = mr->lkey;
 700         resp.rkey      = mr->rkey;
 701         resp.mr_handle = uobj->id;
 702
 703         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 704                 ret = -EFAULT;
 705                 goto err_copy;
 706         }
 707
 708         uobj_put_obj_read(pd);
 709
 710         uobj_alloc_commit(uobj);
 711
 712         return in_len;
 713
 714 err_copy:
 715         ib_dereg_mr(mr);
 716
 717 err_put:
 718         uobj_put_obj_read(pd);
 719
 720 err_free:
 721         uobj_alloc_abort(uobj);
 722         return ret;
 723 }
 724
 725 ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
 726                            struct ib_device *ib_dev,
 727                            const char __user *buf, int in_len,
 728                            int out_len)
 729 {
 730         struct ib_uverbs_rereg_mr      cmd;
 731         struct ib_uverbs_rereg_mr_resp resp;
 732         struct ib_udata              udata;
 733         struct ib_pd                *pd = NULL;
 734         struct ib_mr                *mr;
 735         struct ib_pd                *old_pd;
 736         int                          ret;
 737         struct ib_uobject           *uobj;
 738
 739         if (out_len < sizeof(resp))
 740                 return -ENOSPC;
 741
 742         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 743                 return -EFAULT;
 744
 745         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 746                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 747                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 748                    out_len - sizeof(resp));
 749
 750         if (cmd.flags & ~IB_MR_REREG_SUPPORTED || !cmd.flags)
 751                 return -EINVAL;
 752
 753         if ((cmd.flags & IB_MR_REREG_TRANS) &&
 754             (!cmd.start || !cmd.hca_va || 0 >= cmd.length ||
 755              (cmd.start & ~PAGE_MASK) != (cmd.hca_va & ~PAGE_MASK)))
 756                         return -EINVAL;
 757
 758         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 759                                file->ucontext);
 760         if (IS_ERR(uobj))
 761                 return PTR_ERR(uobj);
 762
 763         mr = uobj->object;
 764
 765         if (cmd.flags & IB_MR_REREG_ACCESS) {
 766                 ret = ib_check_mr_access(cmd.access_flags);
 767                 if (ret)
 768                         goto put_uobjs;
 769         }
 770
 771         if (cmd.flags & IB_MR_REREG_PD) {
 772                 pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 773                 if (!pd) {
 774                         ret = -EINVAL;
 775                         goto put_uobjs;
 776                 }
 777         }
 778
 779         old_pd = mr->pd;
 780         ret = mr->device->rereg_user_mr(mr, cmd.flags, cmd.start,
 781                                         cmd.length, cmd.hca_va,
 782                                         cmd.access_flags, pd, &udata);
 783         if (!ret) {
 784                 if (cmd.flags & IB_MR_REREG_PD) {
 785                         atomic_inc(&pd->usecnt);
 786                         mr->pd = pd;
 787                         atomic_dec(&old_pd->usecnt);
 788                 }
 789         } else {
 790                 goto put_uobj_pd;
 791         }
 792
 793         memset(&resp, 0, sizeof(resp));
 794         resp.lkey      = mr->lkey;
 795         resp.rkey      = mr->rkey;
 796
 797         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
 798                 ret = -EFAULT;
 799         else
 800                 ret = in_len;
 801
 802 put_uobj_pd:
 803         if (cmd.flags & IB_MR_REREG_PD)
 804                 uobj_put_obj_read(pd);
 805
 806 put_uobjs:
 807         uobj_put_write(uobj);
 808
 809         return ret;
 810 }
 811
 812 ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
 813                            struct ib_device *ib_dev,
 814                            const char __user *buf, int in_len,
 815                            int out_len)
 816 {
 817         struct ib_uverbs_dereg_mr cmd;
 818         struct ib_uobject        *uobj;
 819         int                       ret = -EINVAL;
 820
 821         if (copy_from_user(&cmd, buf, sizeof cmd))
 822                 return -EFAULT;
 823
 824         uobj  = uobj_get_write(uobj_get_type(mr), cmd.mr_handle,
 825                                file->ucontext);
 826         if (IS_ERR(uobj))
 827                 return PTR_ERR(uobj);
 828
 829         ret = uobj_remove_commit(uobj);
 830
 831         return ret ?: in_len;
 832 }
 833
 834 ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
 835                            struct ib_device *ib_dev,
 836                            const char __user *buf, int in_len,
 837                            int out_len)
 838 {
 839         struct ib_uverbs_alloc_mw      cmd;
 840         struct ib_uverbs_alloc_mw_resp resp;
 841         struct ib_uobject             *uobj;
 842         struct ib_pd                  *pd;
 843         struct ib_mw                  *mw;
 844         struct ib_udata                udata;
 845         int                            ret;
 846
 847         if (out_len < sizeof(resp))
 848                 return -ENOSPC;
 849
 850         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 851                 return -EFAULT;
 852
 853         uobj  = uobj_alloc(uobj_get_type(mw), file->ucontext);
 854         if (IS_ERR(uobj))
 855                 return PTR_ERR(uobj);
 856
 857         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
 858         if (!pd) {
 859                 ret = -EINVAL;
 860                 goto err_free;
 861         }
 862
 863         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
 864                    u64_to_user_ptr(cmd.response) + sizeof(resp),
 865                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
 866                    out_len - sizeof(resp));
 867
 868         mw = pd->device->alloc_mw(pd, cmd.mw_type, &udata);
 869         if (IS_ERR(mw)) {
 870                 ret = PTR_ERR(mw);
 871                 goto err_put;
 872         }
 873
 874         mw->device  = pd->device;
 875         mw->pd      = pd;
 876         mw->uobject = uobj;
 877         atomic_inc(&pd->usecnt);
 878
 879         uobj->object = mw;
 880
 881         memset(&resp, 0, sizeof(resp));
 882         resp.rkey      = mw->rkey;
 883         resp.mw_handle = uobj->id;
 884
 885         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp))) {
 886                 ret = -EFAULT;
 887                 goto err_copy;
 888         }
 889
 890         uobj_put_obj_read(pd);
 891         uobj_alloc_commit(uobj);
 892
 893         return in_len;
 894
 895 err_copy:
 896         uverbs_dealloc_mw(mw);
 897 err_put:
 898         uobj_put_obj_read(pd);
 899 err_free:
 900         uobj_alloc_abort(uobj);
 901         return ret;
 902 }
 903
 904 ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
 905                              struct ib_device *ib_dev,
 906                              const char __user *buf, int in_len,
 907                              int out_len)
 908 {
 909         struct ib_uverbs_dealloc_mw cmd;
 910         struct ib_uobject          *uobj;
 911         int                         ret = -EINVAL;
 912
 913         if (copy_from_user(&cmd, buf, sizeof(cmd)))
 914                 return -EFAULT;
 915
 916         uobj  = uobj_get_write(uobj_get_type(mw), cmd.mw_handle,
 917                                file->ucontext);
 918         if (IS_ERR(uobj))
 919                 return PTR_ERR(uobj);
 920
 921         ret = uobj_remove_commit(uobj);
 922         return ret ?: in_len;
 923 }
 924
 925 ssize_t ib_uverbs_create_comp_channel(struct ib_uverbs_file *file,
 926                                       struct ib_device *ib_dev,
 927                                       const char __user *buf, int in_len,
 928                                       int out_len)
 929 {
 930         struct ib_uverbs_create_comp_channel       cmd;
 931         struct ib_uverbs_create_comp_channel_resp  resp;
 932         struct ib_uobject                         *uobj;
 933         struct ib_uverbs_completion_event_file    *ev_file;
 934
 935         if (out_len < sizeof resp)
 936                 return -ENOSPC;
 937
 938         if (copy_from_user(&cmd, buf, sizeof cmd))
 939                 return -EFAULT;
 940
 941         uobj = uobj_alloc(uobj_get_type(comp_channel), file->ucontext);
 942         if (IS_ERR(uobj))
 943                 return PTR_ERR(uobj);
 944
 945         resp.fd = uobj->id;
 946
 947         ev_file = container_of(uobj, struct ib_uverbs_completion_event_file,
 948                                uobj_file.uobj);
 949         ib_uverbs_init_event_queue(&ev_file->ev_queue);
 950
 951         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
 952                 uobj_alloc_abort(uobj);
 953                 return -EFAULT;
 954         }
 955
 956         uobj_alloc_commit(uobj);
 957         return in_len;
 958 }
 959
 960 static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
 961                                         struct ib_device *ib_dev,
 962                                        struct ib_udata *ucore,
 963                                        struct ib_udata *uhw,
 964                                        struct ib_uverbs_ex_create_cq *cmd,
 965                                        size_t cmd_sz,
 966                                        int (*cb)(struct ib_uverbs_file *file,
 967                                                  struct ib_ucq_object *obj,
 968                                                  struct ib_uverbs_ex_create_cq_resp *resp,
 969                                                  struct ib_udata *udata,
 970                                                  void *context),
 971                                        void *context)
 972 {
 973         struct ib_ucq_object           *obj;
 974         struct ib_uverbs_completion_event_file    *ev_file = NULL;
 975         struct ib_cq                   *cq;
 976         int                             ret;
 977         struct ib_uverbs_ex_create_cq_resp resp;
 978         struct ib_cq_init_attr attr = {};
 979
 980         if (cmd->comp_vector >= file->device->num_comp_vectors)
 981                 return ERR_PTR(-EINVAL);
 982
 983         obj  = (struct ib_ucq_object *)uobj_alloc(uobj_get_type(cq),
 984                                                   file->ucontext);
 985         if (IS_ERR(obj))
 986                 return obj;
 987
 988         if (cmd->comp_channel >= 0) {
 989                 ev_file = ib_uverbs_lookup_comp_file(cmd->comp_channel,
 990                                                      file->ucontext);
 991                 if (IS_ERR(ev_file)) {
 992                         ret = PTR_ERR(ev_file);
 993                         goto err;
 994                 }
 995         }
 996
 997         obj->uobject.user_handle = cmd->user_handle;
 998         obj->uverbs_file           = file;
 999         obj->comp_events_reported  = 0;
1000         obj->async_events_reported = 0;
1001         INIT_LIST_HEAD(&obj->comp_list);
1002         INIT_LIST_HEAD(&obj->async_list);
1003
1004         attr.cqe = cmd->cqe;
1005         attr.comp_vector = cmd->comp_vector;
1006
1007         if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
1008                 attr.flags = cmd->flags;
1009
1010         cq = ib_dev->create_cq(ib_dev, &attr, file->ucontext, uhw);
1011         if (IS_ERR(cq)) {
1012                 ret = PTR_ERR(cq);
1013                 goto err_file;
1014         }
1015
1016         cq->device        = ib_dev;
1017         cq->uobject       = &obj->uobject;
1018         cq->comp_handler  = ib_uverbs_comp_handler;
1019         cq->event_handler = ib_uverbs_cq_event_handler;
1020         cq->cq_context    = ev_file ? &ev_file->ev_queue : NULL;
1021         atomic_set(&cq->usecnt, 0);
1022
1023         obj->uobject.object = cq;
1024         memset(&resp, 0, sizeof resp);
1025         resp.base.cq_handle = obj->uobject.id;
1026         resp.base.cqe       = cq->cqe;
1027
1028         resp.response_length = offsetof(typeof(resp), response_length) +
1029                 sizeof(resp.response_length);
1030
1031         ret = cb(file, obj, &resp, ucore, context);
1032         if (ret)
1033                 goto err_cb;
1034
1035         uobj_alloc_commit(&obj->uobject);
1036
1037         return obj;
1038
1039 err_cb:
1040         ib_destroy_cq(cq);
1041
1042 err_file:
1043         if (ev_file)
1044                 ib_uverbs_release_ucq(file, ev_file, obj);
1045
1046 err:
1047         uobj_alloc_abort(&obj->uobject);
1048
1049         return ERR_PTR(ret);
1050 }
1051
1052 static int ib_uverbs_create_cq_cb(struct ib_uverbs_file *file,
1053                                   struct ib_ucq_object *obj,
1054                                   struct ib_uverbs_ex_create_cq_resp *resp,
1055                                   struct ib_udata *ucore, void *context)
1056 {
1057         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1058                 return -EFAULT;
1059
1060         return 0;
1061 }
1062
1063 ssize_t ib_uverbs_create_cq(struct ib_uverbs_file *file,
1064                             struct ib_device *ib_dev,
1065                             const char __user *buf, int in_len,
1066                             int out_len)
1067 {
1068         struct ib_uverbs_create_cq      cmd;
1069         struct ib_uverbs_ex_create_cq   cmd_ex;
1070         struct ib_uverbs_create_cq_resp resp;
1071         struct ib_udata                 ucore;
1072         struct ib_udata                 uhw;
1073         struct ib_ucq_object           *obj;
1074
1075         if (out_len < sizeof(resp))
1076                 return -ENOSPC;
1077
1078         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1079                 return -EFAULT;
1080
1081         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1082                              sizeof(cmd), sizeof(resp));
1083
1084         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1085                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1086                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1087                    out_len - sizeof(resp));
1088
1089         memset(&cmd_ex, 0, sizeof(cmd_ex));
1090         cmd_ex.user_handle = cmd.user_handle;
1091         cmd_ex.cqe = cmd.cqe;
1092         cmd_ex.comp_vector = cmd.comp_vector;
1093         cmd_ex.comp_channel = cmd.comp_channel;
1094
1095         obj = create_cq(file, ib_dev, &ucore, &uhw, &cmd_ex,
1096                         offsetof(typeof(cmd_ex), comp_channel) +
1097                         sizeof(cmd.comp_channel), ib_uverbs_create_cq_cb,
1098                         NULL);
1099
1100         if (IS_ERR(obj))
1101                 return PTR_ERR(obj);
1102
1103         return in_len;
1104 }
1105
1106 static int ib_uverbs_ex_create_cq_cb(struct ib_uverbs_file *file,
1107                                      struct ib_ucq_object *obj,
1108                                      struct ib_uverbs_ex_create_cq_resp *resp,
1109                                      struct ib_udata *ucore, void *context)
1110 {
1111         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1112                 return -EFAULT;
1113
1114         return 0;
1115 }
1116
1117 int ib_uverbs_ex_create_cq(struct ib_uverbs_file *file,
1118                          struct ib_device *ib_dev,
1119                            struct ib_udata *ucore,
1120                            struct ib_udata *uhw)
1121 {
1122         struct ib_uverbs_ex_create_cq_resp resp;
1123         struct ib_uverbs_ex_create_cq  cmd;
1124         struct ib_ucq_object           *obj;
1125         int err;
1126
1127         if (ucore->inlen < sizeof(cmd))
1128                 return -EINVAL;
1129
1130         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
1131         if (err)
1132                 return err;
1133
1134         if (cmd.comp_mask)
1135                 return -EINVAL;
1136
1137         if (cmd.reserved)
1138                 return -EINVAL;
1139
1140         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1141                              sizeof(resp.response_length)))
1142                 return -ENOSPC;
1143
1144         obj = create_cq(file, ib_dev, ucore, uhw, &cmd,
1145                         min(ucore->inlen, sizeof(cmd)),
1146                         ib_uverbs_ex_create_cq_cb, NULL);
1147
1148         if (IS_ERR(obj))
1149                 return PTR_ERR(obj);
1150
1151         return 0;
1152 }
1153
1154 ssize_t ib_uverbs_resize_cq(struct ib_uverbs_file *file,
1155                             struct ib_device *ib_dev,
1156                             const char __user *buf, int in_len,
1157                             int out_len)
1158 {
1159         struct ib_uverbs_resize_cq      cmd;
1160         struct ib_uverbs_resize_cq_resp resp = {};
1161         struct ib_udata                 udata;
1162         struct ib_cq                    *cq;
1163         int                             ret = -EINVAL;
1164
1165         if (copy_from_user(&cmd, buf, sizeof cmd))
1166                 return -EFAULT;
1167
1168         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1169                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1170                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1171                    out_len - sizeof(resp));
1172
1173         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1174         if (!cq)
1175                 return -EINVAL;
1176
1177         ret = cq->device->resize_cq(cq, cmd.cqe, &udata);
1178         if (ret)
1179                 goto out;
1180
1181         resp.cqe = cq->cqe;
1182
1183         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp.cqe))
1184                 ret = -EFAULT;
1185
1186 out:
1187         uobj_put_obj_read(cq);
1188
1189         return ret ? ret : in_len;
1190 }
1191
1192 static int copy_wc_to_user(struct ib_device *ib_dev, void __user *dest,
1193                            struct ib_wc *wc)
1194 {
1195         struct ib_uverbs_wc tmp;
1196
1197         tmp.wr_id               = wc->wr_id;
1198         tmp.status              = wc->status;
1199         tmp.opcode              = wc->opcode;
1200         tmp.vendor_err          = wc->vendor_err;
1201         tmp.byte_len            = wc->byte_len;
1202         tmp.ex.imm_data         = (__u32 __force) wc->ex.imm_data;
1203         tmp.qp_num              = wc->qp->qp_num;
1204         tmp.src_qp              = wc->src_qp;
1205         tmp.wc_flags            = wc->wc_flags;
1206         tmp.pkey_index          = wc->pkey_index;
1207         if (rdma_cap_opa_ah(ib_dev, wc->port_num))
1208                 tmp.slid        = OPA_TO_IB_UCAST_LID(wc->slid);
1209         else
1210                 tmp.slid        = ib_lid_cpu16(wc->slid);
1211         tmp.sl                  = wc->sl;
1212         tmp.dlid_path_bits      = wc->dlid_path_bits;
1213         tmp.port_num            = wc->port_num;
1214         tmp.reserved            = 0;
1215
1216         if (copy_to_user(dest, &tmp, sizeof tmp))
1217                 return -EFAULT;
1218
1219         return 0;
1220 }
1221
1222 ssize_t ib_uverbs_poll_cq(struct ib_uverbs_file *file,
1223                           struct ib_device *ib_dev,
1224                           const char __user *buf, int in_len,
1225                           int out_len)
1226 {
1227         struct ib_uverbs_poll_cq       cmd;
1228         struct ib_uverbs_poll_cq_resp  resp;
1229         u8 __user                     *header_ptr;
1230         u8 __user                     *data_ptr;
1231         struct ib_cq                  *cq;
1232         struct ib_wc                   wc;
1233         int                            ret;
1234
1235         if (copy_from_user(&cmd, buf, sizeof cmd))
1236                 return -EFAULT;
1237
1238         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1239         if (!cq)
1240                 return -EINVAL;
1241
1242         /* we copy a struct ib_uverbs_poll_cq_resp to user space */
1243         header_ptr = u64_to_user_ptr(cmd.response);
1244         data_ptr = header_ptr + sizeof resp;
1245
1246         memset(&resp, 0, sizeof resp);
1247         while (resp.count < cmd.ne) {
1248                 ret = ib_poll_cq(cq, 1, &wc);
1249                 if (ret < 0)
1250                         goto out_put;
1251                 if (!ret)
1252                         break;
1253
1254                 ret = copy_wc_to_user(ib_dev, data_ptr, &wc);
1255                 if (ret)
1256                         goto out_put;
1257
1258                 data_ptr += sizeof(struct ib_uverbs_wc);
1259                 ++resp.count;
1260         }
1261
1262         if (copy_to_user(header_ptr, &resp, sizeof resp)) {
1263                 ret = -EFAULT;
1264                 goto out_put;
1265         }
1266
1267         ret = in_len;
1268
1269 out_put:
1270         uobj_put_obj_read(cq);
1271         return ret;
1272 }
1273
1274 ssize_t ib_uverbs_req_notify_cq(struct ib_uverbs_file *file,
1275                                 struct ib_device *ib_dev,
1276                                 const char __user *buf, int in_len,
1277                                 int out_len)
1278 {
1279         struct ib_uverbs_req_notify_cq cmd;
1280         struct ib_cq                  *cq;
1281
1282         if (copy_from_user(&cmd, buf, sizeof cmd))
1283                 return -EFAULT;
1284
1285         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
1286         if (!cq)
1287                 return -EINVAL;
1288
1289         ib_req_notify_cq(cq, cmd.solicited_only ?
1290                          IB_CQ_SOLICITED : IB_CQ_NEXT_COMP);
1291
1292         uobj_put_obj_read(cq);
1293
1294         return in_len;
1295 }
1296
1297 ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
1298                              struct ib_device *ib_dev,
1299                              const char __user *buf, int in_len,
1300                              int out_len)
1301 {
1302         struct ib_uverbs_destroy_cq      cmd;
1303         struct ib_uverbs_destroy_cq_resp resp;
1304         struct ib_uobject               *uobj;
1305         struct ib_cq                    *cq;
1306         struct ib_ucq_object            *obj;
1307         int                              ret = -EINVAL;
1308
1309         if (copy_from_user(&cmd, buf, sizeof cmd))
1310                 return -EFAULT;
1311
1312         uobj  = uobj_get_write(uobj_get_type(cq), cmd.cq_handle,
1313                                file->ucontext);
1314         if (IS_ERR(uobj))
1315                 return PTR_ERR(uobj);
1316
1317         /*
1318          * Make sure we don't free the memory in remove_commit as we still
1319          * needs the uobject memory to create the response.
1320          */
1321         uverbs_uobject_get(uobj);
1322         cq      = uobj->object;
1323         obj     = container_of(cq->uobject, struct ib_ucq_object, uobject);
1324
1325         memset(&resp, 0, sizeof(resp));
1326
1327         ret = uobj_remove_commit(uobj);
1328         if (ret) {
1329                 uverbs_uobject_put(uobj);
1330                 return ret;
1331         }
1332
1333         resp.comp_events_reported  = obj->comp_events_reported;
1334         resp.async_events_reported = obj->async_events_reported;
1335
1336         uverbs_uobject_put(uobj);
1337         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1338                 return -EFAULT;
1339
1340         return in_len;
1341 }
1342
1343 static int create_qp(struct ib_uverbs_file *file,
1344                      struct ib_udata *ucore,
1345                      struct ib_udata *uhw,
1346                      struct ib_uverbs_ex_create_qp *cmd,
1347                      size_t cmd_sz,
1348                      int (*cb)(struct ib_uverbs_file *file,
1349                                struct ib_uverbs_ex_create_qp_resp *resp,
1350                                struct ib_udata *udata),
1351                      void *context)
1352 {
1353         struct ib_uqp_object            *obj;
1354         struct ib_device                *device;
1355         struct ib_pd                    *pd = NULL;
1356         struct ib_xrcd                  *xrcd = NULL;
1357         struct ib_uobject               *xrcd_uobj = ERR_PTR(-ENOENT);
1358         struct ib_cq                    *scq = NULL, *rcq = NULL;
1359         struct ib_srq                   *srq = NULL;
1360         struct ib_qp                    *qp;
1361         char                            *buf;
1362         struct ib_qp_init_attr          attr = {};
1363         struct ib_uverbs_ex_create_qp_resp resp;
1364         int                             ret;
1365         struct ib_rwq_ind_table *ind_tbl = NULL;
1366         bool has_sq = true;
1367
1368         if (cmd->qp_type == IB_QPT_RAW_PACKET && !capable(CAP_NET_RAW))
1369                 return -EPERM;
1370
1371         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1372                                                   file->ucontext);
1373         if (IS_ERR(obj))
1374                 return PTR_ERR(obj);
1375         obj->uxrcd = NULL;
1376         obj->uevent.uobject.user_handle = cmd->user_handle;
1377         mutex_init(&obj->mcast_lock);
1378
1379         if (cmd_sz >= offsetof(typeof(*cmd), rwq_ind_tbl_handle) +
1380                       sizeof(cmd->rwq_ind_tbl_handle) &&
1381                       (cmd->comp_mask & IB_UVERBS_CREATE_QP_MASK_IND_TABLE)) {
1382                 ind_tbl = uobj_get_obj_read(rwq_ind_table,
1383                                             cmd->rwq_ind_tbl_handle,
1384                                             file->ucontext);
1385                 if (!ind_tbl) {
1386                         ret = -EINVAL;
1387                         goto err_put;
1388                 }
1389
1390                 attr.rwq_ind_tbl = ind_tbl;
1391         }
1392
1393         if (cmd_sz > sizeof(*cmd) &&
1394             !ib_is_udata_cleared(ucore, sizeof(*cmd),
1395                                  cmd_sz - sizeof(*cmd))) {
1396                 ret = -EOPNOTSUPP;
1397                 goto err_put;
1398         }
1399
1400         if (ind_tbl && (cmd->max_recv_wr || cmd->max_recv_sge || cmd->is_srq)) {
1401                 ret = -EINVAL;
1402                 goto err_put;
1403         }
1404
1405         if (ind_tbl && !cmd->max_send_wr)
1406                 has_sq = false;
1407
1408         if (cmd->qp_type == IB_QPT_XRC_TGT) {
1409                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->pd_handle,
1410                                           file->ucontext);
1411
1412                 if (IS_ERR(xrcd_uobj)) {
1413                         ret = -EINVAL;
1414                         goto err_put;
1415                 }
1416
1417                 xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1418                 if (!xrcd) {
1419                         ret = -EINVAL;
1420                         goto err_put;
1421                 }
1422                 device = xrcd->device;
1423         } else {
1424                 if (cmd->qp_type == IB_QPT_XRC_INI) {
1425                         cmd->max_recv_wr = 0;
1426                         cmd->max_recv_sge = 0;
1427                 } else {
1428                         if (cmd->is_srq) {
1429                                 srq = uobj_get_obj_read(srq, cmd->srq_handle,
1430                                                         file->ucontext);
1431                                 if (!srq || srq->srq_type == IB_SRQT_XRC) {
1432                                         ret = -EINVAL;
1433                                         goto err_put;
1434                                 }
1435                         }
1436
1437                         if (!ind_tbl) {
1438                                 if (cmd->recv_cq_handle != cmd->send_cq_handle) {
1439                                         rcq = uobj_get_obj_read(cq, cmd->recv_cq_handle,
1440                                                                 file->ucontext);
1441                                         if (!rcq) {
1442                                                 ret = -EINVAL;
1443                                                 goto err_put;
1444                                         }
1445                                 }
1446                         }
1447                 }
1448
1449                 if (has_sq)
1450                         scq = uobj_get_obj_read(cq, cmd->send_cq_handle,
1451                                                 file->ucontext);
1452                 if (!ind_tbl)
1453                         rcq = rcq ?: scq;
1454                 pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
1455                 if (!pd || (!scq && has_sq)) {
1456                         ret = -EINVAL;
1457                         goto err_put;
1458                 }
1459
1460                 device = pd->device;
1461         }
1462
1463         attr.event_handler = ib_uverbs_qp_event_handler;
1464         attr.qp_context    = file;
1465         attr.send_cq       = scq;
1466         attr.recv_cq       = rcq;
1467         attr.srq           = srq;
1468         attr.xrcd          = xrcd;
1469         attr.sq_sig_type   = cmd->sq_sig_all ? IB_SIGNAL_ALL_WR :
1470                                               IB_SIGNAL_REQ_WR;
1471         attr.qp_type       = cmd->qp_type;
1472         attr.create_flags  = 0;
1473
1474         attr.cap.max_send_wr     = cmd->max_send_wr;
1475         attr.cap.max_recv_wr     = cmd->max_recv_wr;
1476         attr.cap.max_send_sge    = cmd->max_send_sge;
1477         attr.cap.max_recv_sge    = cmd->max_recv_sge;
1478         attr.cap.max_inline_data = cmd->max_inline_data;
1479
1480         obj->uevent.events_reported     = 0;
1481         INIT_LIST_HEAD(&obj->uevent.event_list);
1482         INIT_LIST_HEAD(&obj->mcast_list);
1483
1484         if (cmd_sz >= offsetof(typeof(*cmd), create_flags) +
1485                       sizeof(cmd->create_flags))
1486                 attr.create_flags = cmd->create_flags;
1487
1488         if (attr.create_flags & ~(IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK |
1489                                 IB_QP_CREATE_CROSS_CHANNEL |
1490                                 IB_QP_CREATE_MANAGED_SEND |
1491                                 IB_QP_CREATE_MANAGED_RECV |
1492                                 IB_QP_CREATE_SCATTER_FCS |
1493                                 IB_QP_CREATE_CVLAN_STRIPPING |
1494                                 IB_QP_CREATE_SOURCE_QPN |
1495                                 IB_QP_CREATE_PCI_WRITE_END_PADDING)) {
1496                 ret = -EINVAL;
1497                 goto err_put;
1498         }
1499
1500         if (attr.create_flags & IB_QP_CREATE_SOURCE_QPN) {
1501                 if (!capable(CAP_NET_RAW)) {
1502                         ret = -EPERM;
1503                         goto err_put;
1504                 }
1505
1506                 attr.source_qpn = cmd->source_qpn;
1507         }
1508
1509         buf = (void *)cmd + sizeof(*cmd);
1510         if (cmd_sz > sizeof(*cmd))
1511                 if (!(buf[0] == 0 && !memcmp(buf, buf + 1,
1512                                              cmd_sz - sizeof(*cmd) - 1))) {
1513                         ret = -EINVAL;
1514                         goto err_put;
1515                 }
1516
1517         if (cmd->qp_type == IB_QPT_XRC_TGT)
1518                 qp = ib_create_qp(pd, &attr);
1519         else
1520                 qp = device->create_qp(pd, &attr, uhw);
1521
1522         if (IS_ERR(qp)) {
1523                 ret = PTR_ERR(qp);
1524                 goto err_put;
1525         }
1526
1527         if (cmd->qp_type != IB_QPT_XRC_TGT) {
1528                 ret = ib_create_qp_security(qp, device);
1529                 if (ret)
1530                         goto err_cb;
1531
1532                 qp->real_qp       = qp;
1533                 qp->device        = device;
1534                 qp->pd            = pd;
1535                 qp->send_cq       = attr.send_cq;
1536                 qp->recv_cq       = attr.recv_cq;
1537                 qp->srq           = attr.srq;
1538                 qp->rwq_ind_tbl   = ind_tbl;
1539                 qp->event_handler = attr.event_handler;
1540                 qp->qp_context    = attr.qp_context;
1541                 qp->qp_type       = attr.qp_type;
1542                 atomic_set(&qp->usecnt, 0);
1543                 atomic_inc(&pd->usecnt);
1544                 qp->port = 0;
1545                 if (attr.send_cq)
1546                         atomic_inc(&attr.send_cq->usecnt);
1547                 if (attr.recv_cq)
1548                         atomic_inc(&attr.recv_cq->usecnt);
1549                 if (attr.srq)
1550                         atomic_inc(&attr.srq->usecnt);
1551                 if (ind_tbl)
1552                         atomic_inc(&ind_tbl->usecnt);
1553         }
1554         qp->uobject = &obj->uevent.uobject;
1555
1556         obj->uevent.uobject.object = qp;
1557
1558         memset(&resp, 0, sizeof resp);
1559         resp.base.qpn             = qp->qp_num;
1560         resp.base.qp_handle       = obj->uevent.uobject.id;
1561         resp.base.max_recv_sge    = attr.cap.max_recv_sge;
1562         resp.base.max_send_sge    = attr.cap.max_send_sge;
1563         resp.base.max_recv_wr     = attr.cap.max_recv_wr;
1564         resp.base.max_send_wr     = attr.cap.max_send_wr;
1565         resp.base.max_inline_data = attr.cap.max_inline_data;
1566
1567         resp.response_length = offsetof(typeof(resp), response_length) +
1568                                sizeof(resp.response_length);
1569
1570         ret = cb(file, &resp, ucore);
1571         if (ret)
1572                 goto err_cb;
1573
1574         if (xrcd) {
1575                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object,
1576                                           uobject);
1577                 atomic_inc(&obj->uxrcd->refcnt);
1578                 uobj_put_read(xrcd_uobj);
1579         }
1580
1581         if (pd)
1582                 uobj_put_obj_read(pd);
1583         if (scq)
1584                 uobj_put_obj_read(scq);
1585         if (rcq && rcq != scq)
1586                 uobj_put_obj_read(rcq);
1587         if (srq)
1588                 uobj_put_obj_read(srq);
1589         if (ind_tbl)
1590                 uobj_put_obj_read(ind_tbl);
1591
1592         uobj_alloc_commit(&obj->uevent.uobject);
1593
1594         return 0;
1595 err_cb:
1596         ib_destroy_qp(qp);
1597
1598 err_put:
1599         if (!IS_ERR(xrcd_uobj))
1600                 uobj_put_read(xrcd_uobj);
1601         if (pd)
1602                 uobj_put_obj_read(pd);
1603         if (scq)
1604                 uobj_put_obj_read(scq);
1605         if (rcq && rcq != scq)
1606                 uobj_put_obj_read(rcq);
1607         if (srq)
1608                 uobj_put_obj_read(srq);
1609         if (ind_tbl)
1610                 uobj_put_obj_read(ind_tbl);
1611
1612         uobj_alloc_abort(&obj->uevent.uobject);
1613         return ret;
1614 }
1615
1616 static int ib_uverbs_create_qp_cb(struct ib_uverbs_file *file,
1617                                   struct ib_uverbs_ex_create_qp_resp *resp,
1618                                   struct ib_udata *ucore)
1619 {
1620         if (ib_copy_to_udata(ucore, &resp->base, sizeof(resp->base)))
1621                 return -EFAULT;
1622
1623         return 0;
1624 }
1625
1626 ssize_t ib_uverbs_create_qp(struct ib_uverbs_file *file,
1627                             struct ib_device *ib_dev,
1628                             const char __user *buf, int in_len,
1629                             int out_len)
1630 {
1631         struct ib_uverbs_create_qp      cmd;
1632         struct ib_uverbs_ex_create_qp   cmd_ex;
1633         struct ib_udata                 ucore;
1634         struct ib_udata                 uhw;
1635         ssize_t resp_size = sizeof(struct ib_uverbs_create_qp_resp);
1636         int                             err;
1637
1638         if (out_len < resp_size)
1639                 return -ENOSPC;
1640
1641         if (copy_from_user(&cmd, buf, sizeof(cmd)))
1642                 return -EFAULT;
1643
1644         ib_uverbs_init_udata(&ucore, buf, u64_to_user_ptr(cmd.response),
1645                    sizeof(cmd), resp_size);
1646         ib_uverbs_init_udata(&uhw, buf + sizeof(cmd),
1647                    u64_to_user_ptr(cmd.response) + resp_size,
1648                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1649                    out_len - resp_size);
1650
1651         memset(&cmd_ex, 0, sizeof(cmd_ex));
1652         cmd_ex.user_handle = cmd.user_handle;
1653         cmd_ex.pd_handle = cmd.pd_handle;
1654         cmd_ex.send_cq_handle = cmd.send_cq_handle;
1655         cmd_ex.recv_cq_handle = cmd.recv_cq_handle;
1656         cmd_ex.srq_handle = cmd.srq_handle;
1657         cmd_ex.max_send_wr = cmd.max_send_wr;
1658         cmd_ex.max_recv_wr = cmd.max_recv_wr;
1659         cmd_ex.max_send_sge = cmd.max_send_sge;
1660         cmd_ex.max_recv_sge = cmd.max_recv_sge;
1661         cmd_ex.max_inline_data = cmd.max_inline_data;
1662         cmd_ex.sq_sig_all = cmd.sq_sig_all;
1663         cmd_ex.qp_type = cmd.qp_type;
1664         cmd_ex.is_srq = cmd.is_srq;
1665
1666         err = create_qp(file, &ucore, &uhw, &cmd_ex,
1667                         offsetof(typeof(cmd_ex), is_srq) +
1668                         sizeof(cmd.is_srq), ib_uverbs_create_qp_cb,
1669                         NULL);
1670
1671         if (err)
1672                 return err;
1673
1674         return in_len;
1675 }
1676
1677 static int ib_uverbs_ex_create_qp_cb(struct ib_uverbs_file *file,
1678                                      struct ib_uverbs_ex_create_qp_resp *resp,
1679                                      struct ib_udata *ucore)
1680 {
1681         if (ib_copy_to_udata(ucore, resp, resp->response_length))
1682                 return -EFAULT;
1683
1684         return 0;
1685 }
1686
1687 int ib_uverbs_ex_create_qp(struct ib_uverbs_file *file,
1688                            struct ib_device *ib_dev,
1689                            struct ib_udata *ucore,
1690                            struct ib_udata *uhw)
1691 {
1692         struct ib_uverbs_ex_create_qp_resp resp;
1693         struct ib_uverbs_ex_create_qp cmd = {0};
1694         int err;
1695
1696         if (ucore->inlen < (offsetof(typeof(cmd), comp_mask) +
1697                             sizeof(cmd.comp_mask)))
1698                 return -EINVAL;
1699
1700         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
1701         if (err)
1702                 return err;
1703
1704         if (cmd.comp_mask & ~IB_UVERBS_CREATE_QP_SUP_COMP_MASK)
1705                 return -EINVAL;
1706
1707         if (cmd.reserved)
1708                 return -EINVAL;
1709
1710         if (ucore->outlen < (offsetof(typeof(resp), response_length) +
1711                              sizeof(resp.response_length)))
1712                 return -ENOSPC;
1713
1714         err = create_qp(file, ucore, uhw, &cmd,
1715                         min(ucore->inlen, sizeof(cmd)),
1716                         ib_uverbs_ex_create_qp_cb, NULL);
1717
1718         if (err)
1719                 return err;
1720
1721         return 0;
1722 }
1723
1724 ssize_t ib_uverbs_open_qp(struct ib_uverbs_file *file,
1725                           struct ib_device *ib_dev,
1726                           const char __user *buf, int in_len, int out_len)
1727 {
1728         struct ib_uverbs_open_qp        cmd;
1729         struct ib_uverbs_create_qp_resp resp;
1730         struct ib_udata                 udata;
1731         struct ib_uqp_object           *obj;
1732         struct ib_xrcd                 *xrcd;
1733         struct ib_uobject              *uninitialized_var(xrcd_uobj);
1734         struct ib_qp                   *qp;
1735         struct ib_qp_open_attr          attr;
1736         int ret;
1737
1738         if (out_len < sizeof resp)
1739                 return -ENOSPC;
1740
1741         if (copy_from_user(&cmd, buf, sizeof cmd))
1742                 return -EFAULT;
1743
1744         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
1745                    u64_to_user_ptr(cmd.response) + sizeof(resp),
1746                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
1747                    out_len - sizeof(resp));
1748
1749         obj  = (struct ib_uqp_object *)uobj_alloc(uobj_get_type(qp),
1750                                                   file->ucontext);
1751         if (IS_ERR(obj))
1752                 return PTR_ERR(obj);
1753
1754         xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd.pd_handle,
1755                                   file->ucontext);
1756         if (IS_ERR(xrcd_uobj)) {
1757                 ret = -EINVAL;
1758                 goto err_put;
1759         }
1760
1761         xrcd = (struct ib_xrcd *)xrcd_uobj->object;
1762         if (!xrcd) {
1763                 ret = -EINVAL;
1764                 goto err_xrcd;
1765         }
1766
1767         attr.event_handler = ib_uverbs_qp_event_handler;
1768         attr.qp_context    = file;
1769         attr.qp_num        = cmd.qpn;
1770         attr.qp_type       = cmd.qp_type;
1771
1772         obj->uevent.events_reported = 0;
1773         INIT_LIST_HEAD(&obj->uevent.event_list);
1774         INIT_LIST_HEAD(&obj->mcast_list);
1775
1776         qp = ib_open_qp(xrcd, &attr);
1777         if (IS_ERR(qp)) {
1778                 ret = PTR_ERR(qp);
1779                 goto err_xrcd;
1780         }
1781
1782         obj->uevent.uobject.object = qp;
1783         obj->uevent.uobject.user_handle = cmd.user_handle;
1784
1785         memset(&resp, 0, sizeof resp);
1786         resp.qpn       = qp->qp_num;
1787         resp.qp_handle = obj->uevent.uobject.id;
1788
1789         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
1790                 ret = -EFAULT;
1791                 goto err_destroy;
1792         }
1793
1794         obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
1795         atomic_inc(&obj->uxrcd->refcnt);
1796         qp->uobject = &obj->uevent.uobject;
1797         uobj_put_read(xrcd_uobj);
1798
1799
1800         uobj_alloc_commit(&obj->uevent.uobject);
1801
1802         return in_len;
1803
1804 err_destroy:
1805         ib_destroy_qp(qp);
1806 err_xrcd:
1807         uobj_put_read(xrcd_uobj);
1808 err_put:
1809         uobj_alloc_abort(&obj->uevent.uobject);
1810         return ret;
1811 }
1812
1813 static void copy_ah_attr_to_uverbs(struct ib_uverbs_qp_dest *uverb_attr,
1814                                    struct rdma_ah_attr *rdma_attr)
1815 {
1816         const struct ib_global_route   *grh;
1817
1818         uverb_attr->dlid              = rdma_ah_get_dlid(rdma_attr);
1819         uverb_attr->sl                = rdma_ah_get_sl(rdma_attr);
1820         uverb_attr->src_path_bits     = rdma_ah_get_path_bits(rdma_attr);
1821         uverb_attr->static_rate       = rdma_ah_get_static_rate(rdma_attr);
1822         uverb_attr->is_global         = !!(rdma_ah_get_ah_flags(rdma_attr) &
1823                                          IB_AH_GRH);
1824         if (uverb_attr->is_global) {
1825                 grh = rdma_ah_read_grh(rdma_attr);
1826                 memcpy(uverb_attr->dgid, grh->dgid.raw, 16);
1827                 uverb_attr->flow_label        = grh->flow_label;
1828                 uverb_attr->sgid_index        = grh->sgid_index;
1829                 uverb_attr->hop_limit         = grh->hop_limit;
1830                 uverb_attr->traffic_class     = grh->traffic_class;
1831         }
1832         uverb_attr->port_num          = rdma_ah_get_port_num(rdma_attr);
1833 }
1834
1835 ssize_t ib_uverbs_query_qp(struct ib_uverbs_file *file,
1836                            struct ib_device *ib_dev,
1837                            const char __user *buf, int in_len,
1838                            int out_len)
1839 {
1840         struct ib_uverbs_query_qp      cmd;
1841         struct ib_uverbs_query_qp_resp resp;
1842         struct ib_qp                   *qp;
1843         struct ib_qp_attr              *attr;
1844         struct ib_qp_init_attr         *init_attr;
1845         int                            ret;
1846
1847         if (copy_from_user(&cmd, buf, sizeof cmd))
1848                 return -EFAULT;
1849
1850         attr      = kmalloc(sizeof *attr, GFP_KERNEL);
1851         init_attr = kmalloc(sizeof *init_attr, GFP_KERNEL);
1852         if (!attr || !init_attr) {
1853                 ret = -ENOMEM;
1854                 goto out;
1855         }
1856
1857         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
1858         if (!qp) {
1859                 ret = -EINVAL;
1860                 goto out;
1861         }
1862
1863         ret = ib_query_qp(qp, attr, cmd.attr_mask, init_attr);
1864
1865         uobj_put_obj_read(qp);
1866
1867         if (ret)
1868                 goto out;
1869
1870         memset(&resp, 0, sizeof resp);
1871
1872         resp.qp_state               = attr->qp_state;
1873         resp.cur_qp_state           = attr->cur_qp_state;
1874         resp.path_mtu               = attr->path_mtu;
1875         resp.path_mig_state         = attr->path_mig_state;
1876         resp.qkey                   = attr->qkey;
1877         resp.rq_psn                 = attr->rq_psn;
1878         resp.sq_psn                 = attr->sq_psn;
1879         resp.dest_qp_num            = attr->dest_qp_num;
1880         resp.qp_access_flags        = attr->qp_access_flags;
1881         resp.pkey_index             = attr->pkey_index;
1882         resp.alt_pkey_index         = attr->alt_pkey_index;
1883         resp.sq_draining            = attr->sq_draining;
1884         resp.max_rd_atomic          = attr->max_rd_atomic;
1885         resp.max_dest_rd_atomic     = attr->max_dest_rd_atomic;
1886         resp.min_rnr_timer          = attr->min_rnr_timer;
1887         resp.port_num               = attr->port_num;
1888         resp.timeout                = attr->timeout;
1889         resp.retry_cnt              = attr->retry_cnt;
1890         resp.rnr_retry              = attr->rnr_retry;
1891         resp.alt_port_num           = attr->alt_port_num;
1892         resp.alt_timeout            = attr->alt_timeout;
1893
1894         copy_ah_attr_to_uverbs(&resp.dest, &attr->ah_attr);
1895         copy_ah_attr_to_uverbs(&resp.alt_dest, &attr->alt_ah_attr);
1896
1897         resp.max_send_wr            = init_attr->cap.max_send_wr;
1898         resp.max_recv_wr            = init_attr->cap.max_recv_wr;
1899         resp.max_send_sge           = init_attr->cap.max_send_sge;
1900         resp.max_recv_sge           = init_attr->cap.max_recv_sge;
1901         resp.max_inline_data        = init_attr->cap.max_inline_data;
1902         resp.sq_sig_all             = init_attr->sq_sig_type == IB_SIGNAL_ALL_WR;
1903
1904         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
1905                 ret = -EFAULT;
1906
1907 out:
1908         kfree(attr);
1909         kfree(init_attr);
1910
1911         return ret ? ret : in_len;
1912 }
1913
1914 /* Remove ignored fields set in the attribute mask */
1915 static int modify_qp_mask(enum ib_qp_type qp_type, int mask)
1916 {
1917         switch (qp_type) {
1918         case IB_QPT_XRC_INI:
1919                 return mask & ~(IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER);
1920         case IB_QPT_XRC_TGT:
1921                 return mask & ~(IB_QP_MAX_QP_RD_ATOMIC | IB_QP_RETRY_CNT |
1922                                 IB_QP_RNR_RETRY);
1923         default:
1924                 return mask;
1925         }
1926 }
1927
1928 static void copy_ah_attr_from_uverbs(struct ib_device *dev,
1929                                      struct rdma_ah_attr *rdma_attr,
1930                                      struct ib_uverbs_qp_dest *uverb_attr)
1931 {
1932         rdma_attr->type = rdma_ah_find_type(dev, uverb_attr->port_num);
1933         if (uverb_attr->is_global) {
1934                 rdma_ah_set_grh(rdma_attr, NULL,
1935                                 uverb_attr->flow_label,
1936                                 uverb_attr->sgid_index,
1937                                 uverb_attr->hop_limit,
1938                                 uverb_attr->traffic_class);
1939                 rdma_ah_set_dgid_raw(rdma_attr, uverb_attr->dgid);
1940         } else {
1941                 rdma_ah_set_ah_flags(rdma_attr, 0);
1942         }
1943         rdma_ah_set_dlid(rdma_attr, uverb_attr->dlid);
1944         rdma_ah_set_sl(rdma_attr, uverb_attr->sl);
1945         rdma_ah_set_path_bits(rdma_attr, uverb_attr->src_path_bits);
1946         rdma_ah_set_static_rate(rdma_attr, uverb_attr->static_rate);
1947         rdma_ah_set_port_num(rdma_attr, uverb_attr->port_num);
1948         rdma_ah_set_make_grd(rdma_attr, false);
1949 }
1950
1951 static int modify_qp(struct ib_uverbs_file *file,
1952                      struct ib_uverbs_ex_modify_qp *cmd, struct ib_udata *udata)
1953 {
1954         struct ib_qp_attr *attr;
1955         struct ib_qp *qp;
1956         int ret;
1957
1958         attr = kmalloc(sizeof *attr, GFP_KERNEL);
1959         if (!attr)
1960                 return -ENOMEM;
1961
1962         qp = uobj_get_obj_read(qp, cmd->base.qp_handle, file->ucontext);
1963         if (!qp) {
1964                 ret = -EINVAL;
1965                 goto out;
1966         }
1967
1968         if ((cmd->base.attr_mask & IB_QP_PORT) &&
1969             !rdma_is_port_valid(qp->device, cmd->base.port_num)) {
1970                 ret = -EINVAL;
1971                 goto release_qp;
1972         }
1973
1974         if ((cmd->base.attr_mask & IB_QP_ALT_PATH) &&
1975             !rdma_is_port_valid(qp->device, cmd->base.alt_port_num)) {
1976                 ret = -EINVAL;
1977                 goto release_qp;
1978         }
1979
1980         attr->qp_state            = cmd->base.qp_state;
1981         attr->cur_qp_state        = cmd->base.cur_qp_state;
1982         attr->path_mtu            = cmd->base.path_mtu;
1983         attr->path_mig_state      = cmd->base.path_mig_state;
1984         attr->qkey                = cmd->base.qkey;
1985         attr->rq_psn              = cmd->base.rq_psn;
1986         attr->sq_psn              = cmd->base.sq_psn;
1987         attr->dest_qp_num         = cmd->base.dest_qp_num;
1988         attr->qp_access_flags     = cmd->base.qp_access_flags;
1989         attr->pkey_index          = cmd->base.pkey_index;
1990         attr->alt_pkey_index      = cmd->base.alt_pkey_index;
1991         attr->en_sqd_async_notify = cmd->base.en_sqd_async_notify;
1992         attr->max_rd_atomic       = cmd->base.max_rd_atomic;
1993         attr->max_dest_rd_atomic  = cmd->base.max_dest_rd_atomic;
1994         attr->min_rnr_timer       = cmd->base.min_rnr_timer;
1995         attr->port_num            = cmd->base.port_num;
1996         attr->timeout             = cmd->base.timeout;
1997         attr->retry_cnt           = cmd->base.retry_cnt;
1998         attr->rnr_retry           = cmd->base.rnr_retry;
1999         attr->alt_port_num        = cmd->base.alt_port_num;
2000         attr->alt_timeout         = cmd->base.alt_timeout;
2001         attr->rate_limit          = cmd->rate_limit;
2002
2003         if (cmd->base.attr_mask & IB_QP_AV)
2004                 copy_ah_attr_from_uverbs(qp->device, &attr->ah_attr,
2005                                          &cmd->base.dest);
2006
2007         if (cmd->base.attr_mask & IB_QP_ALT_PATH)
2008                 copy_ah_attr_from_uverbs(qp->device, &attr->alt_ah_attr,
2009                                          &cmd->base.alt_dest);
2010
2011         ret = ib_modify_qp_with_udata(qp, attr,
2012                                       modify_qp_mask(qp->qp_type,
2013                                                      cmd->base.attr_mask),
2014                                       udata);
2015
2016 release_qp:
2017         uobj_put_obj_read(qp);
2018 out:
2019         kfree(attr);
2020
2021         return ret;
2022 }
2023
2024 ssize_t ib_uverbs_modify_qp(struct ib_uverbs_file *file,
2025                             struct ib_device *ib_dev,
2026                             const char __user *buf, int in_len,
2027                             int out_len)
2028 {
2029         struct ib_uverbs_ex_modify_qp cmd = {};
2030         struct ib_udata udata;
2031         int ret;
2032
2033         if (copy_from_user(&cmd.base, buf, sizeof(cmd.base)))
2034                 return -EFAULT;
2035
2036         if (cmd.base.attr_mask &
2037             ~((IB_USER_LEGACY_LAST_QP_ATTR_MASK << 1) - 1))
2038                 return -EOPNOTSUPP;
2039
2040         ib_uverbs_init_udata(&udata, buf + sizeof(cmd.base), NULL,
2041                    in_len - sizeof(cmd.base) - sizeof(struct ib_uverbs_cmd_hdr),
2042                    out_len);
2043
2044         ret = modify_qp(file, &cmd, &udata);
2045         if (ret)
2046                 return ret;
2047
2048         return in_len;
2049 }
2050
2051 int ib_uverbs_ex_modify_qp(struct ib_uverbs_file *file,
2052                            struct ib_device *ib_dev,
2053                            struct ib_udata *ucore,
2054                            struct ib_udata *uhw)
2055 {
2056         struct ib_uverbs_ex_modify_qp cmd = {};
2057         int ret;
2058
2059         /*
2060          * Last bit is reserved for extending the attr_mask by
2061          * using another field.
2062          */
2063         BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
2064
2065         if (ucore->inlen < sizeof(cmd.base))
2066                 return -EINVAL;
2067
2068         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2069         if (ret)
2070                 return ret;
2071
2072         if (cmd.base.attr_mask &
2073             ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))
2074                 return -EOPNOTSUPP;
2075
2076         if (ucore->inlen > sizeof(cmd)) {
2077                 if (!ib_is_udata_cleared(ucore, sizeof(cmd),
2078                                          ucore->inlen - sizeof(cmd)))
2079                         return -EOPNOTSUPP;
2080         }
2081
2082         ret = modify_qp(file, &cmd, uhw);
2083
2084         return ret;
2085 }
2086
2087 ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
2088                              struct ib_device *ib_dev,
2089                              const char __user *buf, int in_len,
2090                              int out_len)
2091 {
2092         struct ib_uverbs_destroy_qp      cmd;
2093         struct ib_uverbs_destroy_qp_resp resp;
2094         struct ib_uobject               *uobj;
2095         struct ib_uqp_object            *obj;
2096         int                              ret = -EINVAL;
2097
2098         if (copy_from_user(&cmd, buf, sizeof cmd))
2099                 return -EFAULT;
2100
2101         memset(&resp, 0, sizeof resp);
2102
2103         uobj  = uobj_get_write(uobj_get_type(qp), cmd.qp_handle,
2104                                file->ucontext);
2105         if (IS_ERR(uobj))
2106                 return PTR_ERR(uobj);
2107
2108         obj = container_of(uobj, struct ib_uqp_object, uevent.uobject);
2109         /*
2110          * Make sure we don't free the memory in remove_commit as we still
2111          * needs the uobject memory to create the response.
2112          */
2113         uverbs_uobject_get(uobj);
2114
2115         ret = uobj_remove_commit(uobj);
2116         if (ret) {
2117                 uverbs_uobject_put(uobj);
2118                 return ret;
2119         }
2120
2121         resp.events_reported = obj->uevent.events_reported;
2122         uverbs_uobject_put(uobj);
2123
2124         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2125                 return -EFAULT;
2126
2127         return in_len;
2128 }
2129
2130 static void *alloc_wr(size_t wr_size, __u32 num_sge)
2131 {
2132         if (num_sge >= (U32_MAX - ALIGN(wr_size, sizeof (struct ib_sge))) /
2133                        sizeof (struct ib_sge))
2134                 return NULL;
2135
2136         return kmalloc(ALIGN(wr_size, sizeof (struct ib_sge)) +
2137                          num_sge * sizeof (struct ib_sge), GFP_KERNEL);
2138 }
2139
2140 ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
2141                             struct ib_device *ib_dev,
2142                             const char __user *buf, int in_len,
2143                             int out_len)
2144 {
2145         struct ib_uverbs_post_send      cmd;
2146         struct ib_uverbs_post_send_resp resp;
2147         struct ib_uverbs_send_wr       *user_wr;
2148         struct ib_send_wr              *wr = NULL, *last, *next, *bad_wr;
2149         struct ib_qp                   *qp;
2150         int                             i, sg_ind;
2151         int                             is_ud;
2152         ssize_t                         ret = -EINVAL;
2153         size_t                          next_size;
2154
2155         if (copy_from_user(&cmd, buf, sizeof cmd))
2156                 return -EFAULT;
2157
2158         if (in_len < sizeof cmd + cmd.wqe_size * cmd.wr_count +
2159             cmd.sge_count * sizeof (struct ib_uverbs_sge))
2160                 return -EINVAL;
2161
2162         if (cmd.wqe_size < sizeof (struct ib_uverbs_send_wr))
2163                 return -EINVAL;
2164
2165         user_wr = kmalloc(cmd.wqe_size, GFP_KERNEL);
2166         if (!user_wr)
2167                 return -ENOMEM;
2168
2169         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2170         if (!qp)
2171                 goto out;
2172
2173         is_ud = qp->qp_type == IB_QPT_UD;
2174         sg_ind = 0;
2175         last = NULL;
2176         for (i = 0; i < cmd.wr_count; ++i) {
2177                 if (copy_from_user(user_wr,
2178                                    buf + sizeof cmd + i * cmd.wqe_size,
2179                                    cmd.wqe_size)) {
2180                         ret = -EFAULT;
2181                         goto out_put;
2182                 }
2183
2184                 if (user_wr->num_sge + sg_ind > cmd.sge_count) {
2185                         ret = -EINVAL;
2186                         goto out_put;
2187                 }
2188
2189                 if (is_ud) {
2190                         struct ib_ud_wr *ud;
2191
2192                         if (user_wr->opcode != IB_WR_SEND &&
2193                             user_wr->opcode != IB_WR_SEND_WITH_IMM) {
2194                                 ret = -EINVAL;
2195                                 goto out_put;
2196                         }
2197
2198                         next_size = sizeof(*ud);
2199                         ud = alloc_wr(next_size, user_wr->num_sge);
2200                         if (!ud) {
2201                                 ret = -ENOMEM;
2202                                 goto out_put;
2203                         }
2204
2205                         ud->ah = uobj_get_obj_read(ah, user_wr->wr.ud.ah,
2206                                                    file->ucontext);
2207                         if (!ud->ah) {
2208                                 kfree(ud);
2209                                 ret = -EINVAL;
2210                                 goto out_put;
2211                         }
2212                         ud->remote_qpn = user_wr->wr.ud.remote_qpn;
2213                         ud->remote_qkey = user_wr->wr.ud.remote_qkey;
2214
2215                         next = &ud->wr;
2216                 } else if (user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM ||
2217                            user_wr->opcode == IB_WR_RDMA_WRITE ||
2218                            user_wr->opcode == IB_WR_RDMA_READ) {
2219                         struct ib_rdma_wr *rdma;
2220
2221                         next_size = sizeof(*rdma);
2222                         rdma = alloc_wr(next_size, user_wr->num_sge);
2223                         if (!rdma) {
2224                                 ret = -ENOMEM;
2225                                 goto out_put;
2226                         }
2227
2228                         rdma->remote_addr = user_wr->wr.rdma.remote_addr;
2229                         rdma->rkey = user_wr->wr.rdma.rkey;
2230
2231                         next = &rdma->wr;
2232                 } else if (user_wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP ||
2233                            user_wr->opcode == IB_WR_ATOMIC_FETCH_AND_ADD) {
2234                         struct ib_atomic_wr *atomic;
2235
2236                         next_size = sizeof(*atomic);
2237                         atomic = alloc_wr(next_size, user_wr->num_sge);
2238                         if (!atomic) {
2239                                 ret = -ENOMEM;
2240                                 goto out_put;
2241                         }
2242
2243                         atomic->remote_addr = user_wr->wr.atomic.remote_addr;
2244                         atomic->compare_add = user_wr->wr.atomic.compare_add;
2245                         atomic->swap = user_wr->wr.atomic.swap;
2246                         atomic->rkey = user_wr->wr.atomic.rkey;
2247
2248                         next = &atomic->wr;
2249                 } else if (user_wr->opcode == IB_WR_SEND ||
2250                            user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2251                            user_wr->opcode == IB_WR_SEND_WITH_INV) {
2252                         next_size = sizeof(*next);
2253                         next = alloc_wr(next_size, user_wr->num_sge);
2254                         if (!next) {
2255                                 ret = -ENOMEM;
2256                                 goto out_put;
2257                         }
2258                 } else {
2259                         ret = -EINVAL;
2260                         goto out_put;
2261                 }
2262
2263                 if (user_wr->opcode == IB_WR_SEND_WITH_IMM ||
2264                     user_wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
2265                         next->ex.imm_data =
2266                                         (__be32 __force) user_wr->ex.imm_data;
2267                 } else if (user_wr->opcode == IB_WR_SEND_WITH_INV) {
2268                         next->ex.invalidate_rkey = user_wr->ex.invalidate_rkey;
2269                 }
2270
2271                 if (!last)
2272                         wr = next;
2273                 else
2274                         last->next = next;
2275                 last = next;
2276
2277                 next->next       = NULL;
2278                 next->wr_id      = user_wr->wr_id;
2279                 next->num_sge    = user_wr->num_sge;
2280                 next->opcode     = user_wr->opcode;
2281                 next->send_flags = user_wr->send_flags;
2282
2283                 if (next->num_sge) {
2284                         next->sg_list = (void *) next +
2285                                 ALIGN(next_size, sizeof(struct ib_sge));
2286                         if (copy_from_user(next->sg_list,
2287                                            buf + sizeof cmd +
2288                                            cmd.wr_count * cmd.wqe_size +
2289                                            sg_ind * sizeof (struct ib_sge),
2290                                            next->num_sge * sizeof (struct ib_sge))) {
2291                                 ret = -EFAULT;
2292                                 goto out_put;
2293                         }
2294                         sg_ind += next->num_sge;
2295                 } else
2296                         next->sg_list = NULL;
2297         }
2298
2299         resp.bad_wr = 0;
2300         ret = qp->device->post_send(qp->real_qp, wr, &bad_wr);
2301         if (ret)
2302                 for (next = wr; next; next = next->next) {
2303                         ++resp.bad_wr;
2304                         if (next == bad_wr)
2305                                 break;
2306                 }
2307
2308         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2309                 ret = -EFAULT;
2310
2311 out_put:
2312         uobj_put_obj_read(qp);
2313
2314         while (wr) {
2315                 if (is_ud && ud_wr(wr)->ah)
2316                         uobj_put_obj_read(ud_wr(wr)->ah);
2317                 next = wr->next;
2318                 kfree(wr);
2319                 wr = next;
2320         }
2321
2322 out:
2323         kfree(user_wr);
2324
2325         return ret ? ret : in_len;
2326 }
2327
2328 static struct ib_recv_wr *ib_uverbs_unmarshall_recv(const char __user *buf,
2329                                                     int in_len,
2330                                                     u32 wr_count,
2331                                                     u32 sge_count,
2332                                                     u32 wqe_size)
2333 {
2334         struct ib_uverbs_recv_wr *user_wr;
2335         struct ib_recv_wr        *wr = NULL, *last, *next;
2336         int                       sg_ind;
2337         int                       i;
2338         int                       ret;
2339
2340         if (in_len < wqe_size * wr_count +
2341             sge_count * sizeof (struct ib_uverbs_sge))
2342                 return ERR_PTR(-EINVAL);
2343
2344         if (wqe_size < sizeof (struct ib_uverbs_recv_wr))
2345                 return ERR_PTR(-EINVAL);
2346
2347         user_wr = kmalloc(wqe_size, GFP_KERNEL);
2348         if (!user_wr)
2349                 return ERR_PTR(-ENOMEM);
2350
2351         sg_ind = 0;
2352         last = NULL;
2353         for (i = 0; i < wr_count; ++i) {
2354                 if (copy_from_user(user_wr, buf + i * wqe_size,
2355                                    wqe_size)) {
2356                         ret = -EFAULT;
2357                         goto err;
2358                 }
2359
2360                 if (user_wr->num_sge + sg_ind > sge_count) {
2361                         ret = -EINVAL;
2362                         goto err;
2363                 }
2364
2365                 if (user_wr->num_sge >=
2366                     (U32_MAX - ALIGN(sizeof *next, sizeof (struct ib_sge))) /
2367                     sizeof (struct ib_sge)) {
2368                         ret = -EINVAL;
2369                         goto err;
2370                 }
2371
2372                 next = kmalloc(ALIGN(sizeof *next, sizeof (struct ib_sge)) +
2373                                user_wr->num_sge * sizeof (struct ib_sge),
2374                                GFP_KERNEL);
2375                 if (!next) {
2376                         ret = -ENOMEM;
2377                         goto err;
2378                 }
2379
2380                 if (!last)
2381                         wr = next;
2382                 else
2383                         last->next = next;
2384                 last = next;
2385
2386                 next->next       = NULL;
2387                 next->wr_id      = user_wr->wr_id;
2388                 next->num_sge    = user_wr->num_sge;
2389
2390                 if (next->num_sge) {
2391                         next->sg_list = (void *) next +
2392                                 ALIGN(sizeof *next, sizeof (struct ib_sge));
2393                         if (copy_from_user(next->sg_list,
2394                                            buf + wr_count * wqe_size +
2395                                            sg_ind * sizeof (struct ib_sge),
2396                                            next->num_sge * sizeof (struct ib_sge))) {
2397                                 ret = -EFAULT;
2398                                 goto err;
2399                         }
2400                         sg_ind += next->num_sge;
2401                 } else
2402                         next->sg_list = NULL;
2403         }
2404
2405         kfree(user_wr);
2406         return wr;
2407
2408 err:
2409         kfree(user_wr);
2410
2411         while (wr) {
2412                 next = wr->next;
2413                 kfree(wr);
2414                 wr = next;
2415         }
2416
2417         return ERR_PTR(ret);
2418 }
2419
2420 ssize_t ib_uverbs_post_recv(struct ib_uverbs_file *file,
2421                             struct ib_device *ib_dev,
2422                             const char __user *buf, int in_len,
2423                             int out_len)
2424 {
2425         struct ib_uverbs_post_recv      cmd;
2426         struct ib_uverbs_post_recv_resp resp;
2427         struct ib_recv_wr              *wr, *next, *bad_wr;
2428         struct ib_qp                   *qp;
2429         ssize_t                         ret = -EINVAL;
2430
2431         if (copy_from_user(&cmd, buf, sizeof cmd))
2432                 return -EFAULT;
2433
2434         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2435                                        in_len - sizeof cmd, cmd.wr_count,
2436                                        cmd.sge_count, cmd.wqe_size);
2437         if (IS_ERR(wr))
2438                 return PTR_ERR(wr);
2439
2440         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2441         if (!qp)
2442                 goto out;
2443
2444         resp.bad_wr = 0;
2445         ret = qp->device->post_recv(qp->real_qp, wr, &bad_wr);
2446
2447         uobj_put_obj_read(qp);
2448         if (ret) {
2449                 for (next = wr; next; next = next->next) {
2450                         ++resp.bad_wr;
2451                         if (next == bad_wr)
2452                                 break;
2453                 }
2454         }
2455
2456         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2457                 ret = -EFAULT;
2458
2459 out:
2460         while (wr) {
2461                 next = wr->next;
2462                 kfree(wr);
2463                 wr = next;
2464         }
2465
2466         return ret ? ret : in_len;
2467 }
2468
2469 ssize_t ib_uverbs_post_srq_recv(struct ib_uverbs_file *file,
2470                                 struct ib_device *ib_dev,
2471                                 const char __user *buf, int in_len,
2472                                 int out_len)
2473 {
2474         struct ib_uverbs_post_srq_recv      cmd;
2475         struct ib_uverbs_post_srq_recv_resp resp;
2476         struct ib_recv_wr                  *wr, *next, *bad_wr;
2477         struct ib_srq                      *srq;
2478         ssize_t                             ret = -EINVAL;
2479
2480         if (copy_from_user(&cmd, buf, sizeof cmd))
2481                 return -EFAULT;
2482
2483         wr = ib_uverbs_unmarshall_recv(buf + sizeof cmd,
2484                                        in_len - sizeof cmd, cmd.wr_count,
2485                                        cmd.sge_count, cmd.wqe_size);
2486         if (IS_ERR(wr))
2487                 return PTR_ERR(wr);
2488
2489         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
2490         if (!srq)
2491                 goto out;
2492
2493         resp.bad_wr = 0;
2494         ret = srq->device->post_srq_recv(srq, wr, &bad_wr);
2495
2496         uobj_put_obj_read(srq);
2497
2498         if (ret)
2499                 for (next = wr; next; next = next->next) {
2500                         ++resp.bad_wr;
2501                         if (next == bad_wr)
2502                                 break;
2503                 }
2504
2505         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
2506                 ret = -EFAULT;
2507
2508 out:
2509         while (wr) {
2510                 next = wr->next;
2511                 kfree(wr);
2512                 wr = next;
2513         }
2514
2515         return ret ? ret : in_len;
2516 }
2517
2518 ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
2519                             struct ib_device *ib_dev,
2520                             const char __user *buf, int in_len,
2521                             int out_len)
2522 {
2523         struct ib_uverbs_create_ah       cmd;
2524         struct ib_uverbs_create_ah_resp  resp;
2525         struct ib_uobject               *uobj;
2526         struct ib_pd                    *pd;
2527         struct ib_ah                    *ah;
2528         struct rdma_ah_attr             attr;
2529         int ret;
2530         struct ib_udata                   udata;
2531
2532         if (out_len < sizeof resp)
2533                 return -ENOSPC;
2534
2535         if (copy_from_user(&cmd, buf, sizeof cmd))
2536                 return -EFAULT;
2537
2538         if (!rdma_is_port_valid(ib_dev, cmd.attr.port_num))
2539                 return -EINVAL;
2540
2541         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
2542                    u64_to_user_ptr(cmd.response) + sizeof(resp),
2543                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
2544                    out_len - sizeof(resp));
2545
2546         uobj  = uobj_alloc(uobj_get_type(ah), file->ucontext);
2547         if (IS_ERR(uobj))
2548                 return PTR_ERR(uobj);
2549
2550         pd = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2551         if (!pd) {
2552                 ret = -EINVAL;
2553                 goto err;
2554         }
2555
2556         attr.type = rdma_ah_find_type(ib_dev, cmd.attr.port_num);
2557         rdma_ah_set_make_grd(&attr, false);
2558         rdma_ah_set_dlid(&attr, cmd.attr.dlid);
2559         rdma_ah_set_sl(&attr, cmd.attr.sl);
2560         rdma_ah_set_path_bits(&attr, cmd.attr.src_path_bits);
2561         rdma_ah_set_static_rate(&attr, cmd.attr.static_rate);
2562         rdma_ah_set_port_num(&attr, cmd.attr.port_num);
2563
2564         if (cmd.attr.is_global) {
2565                 rdma_ah_set_grh(&attr, NULL, cmd.attr.grh.flow_label,
2566                                 cmd.attr.grh.sgid_index,
2567                                 cmd.attr.grh.hop_limit,
2568                                 cmd.attr.grh.traffic_class);
2569                 rdma_ah_set_dgid_raw(&attr, cmd.attr.grh.dgid);
2570         } else {
2571                 rdma_ah_set_ah_flags(&attr, 0);
2572         }
2573
2574         ah = rdma_create_user_ah(pd, &attr, &udata);
2575         if (IS_ERR(ah)) {
2576                 ret = PTR_ERR(ah);
2577                 goto err_put;
2578         }
2579
2580         ah->uobject  = uobj;
2581         uobj->user_handle = cmd.user_handle;
2582         uobj->object = ah;
2583
2584         resp.ah_handle = uobj->id;
2585
2586         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp)) {
2587                 ret = -EFAULT;
2588                 goto err_copy;
2589         }
2590
2591         uobj_put_obj_read(pd);
2592         uobj_alloc_commit(uobj);
2593
2594         return in_len;
2595
2596 err_copy:
2597         rdma_destroy_ah(ah);
2598
2599 err_put:
2600         uobj_put_obj_read(pd);
2601
2602 err:
2603         uobj_alloc_abort(uobj);
2604         return ret;
2605 }
2606
2607 ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
2608                              struct ib_device *ib_dev,
2609                              const char __user *buf, int in_len, int out_len)
2610 {
2611         struct ib_uverbs_destroy_ah cmd;
2612         struct ib_uobject          *uobj;
2613         int                         ret;
2614
2615         if (copy_from_user(&cmd, buf, sizeof cmd))
2616                 return -EFAULT;
2617
2618         uobj  = uobj_get_write(uobj_get_type(ah), cmd.ah_handle,
2619                                file->ucontext);
2620         if (IS_ERR(uobj))
2621                 return PTR_ERR(uobj);
2622
2623         ret = uobj_remove_commit(uobj);
2624         return ret ?: in_len;
2625 }
2626
2627 ssize_t ib_uverbs_attach_mcast(struct ib_uverbs_file *file,
2628                                struct ib_device *ib_dev,
2629                                const char __user *buf, int in_len,
2630                                int out_len)
2631 {
2632         struct ib_uverbs_attach_mcast cmd;
2633         struct ib_qp                 *qp;
2634         struct ib_uqp_object         *obj;
2635         struct ib_uverbs_mcast_entry *mcast;
2636         int                           ret;
2637
2638         if (copy_from_user(&cmd, buf, sizeof cmd))
2639                 return -EFAULT;
2640
2641         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2642         if (!qp)
2643                 return -EINVAL;
2644
2645         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2646
2647         mutex_lock(&obj->mcast_lock);
2648         list_for_each_entry(mcast, &obj->mcast_list, list)
2649                 if (cmd.mlid == mcast->lid &&
2650                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2651                         ret = 0;
2652                         goto out_put;
2653                 }
2654
2655         mcast = kmalloc(sizeof *mcast, GFP_KERNEL);
2656         if (!mcast) {
2657                 ret = -ENOMEM;
2658                 goto out_put;
2659         }
2660
2661         mcast->lid = cmd.mlid;
2662         memcpy(mcast->gid.raw, cmd.gid, sizeof mcast->gid.raw);
2663
2664         ret = ib_attach_mcast(qp, &mcast->gid, cmd.mlid);
2665         if (!ret)
2666                 list_add_tail(&mcast->list, &obj->mcast_list);
2667         else
2668                 kfree(mcast);
2669
2670 out_put:
2671         mutex_unlock(&obj->mcast_lock);
2672         uobj_put_obj_read(qp);
2673
2674         return ret ? ret : in_len;
2675 }
2676
2677 ssize_t ib_uverbs_detach_mcast(struct ib_uverbs_file *file,
2678                                struct ib_device *ib_dev,
2679                                const char __user *buf, int in_len,
2680                                int out_len)
2681 {
2682         struct ib_uverbs_detach_mcast cmd;
2683         struct ib_uqp_object         *obj;
2684         struct ib_qp                 *qp;
2685         struct ib_uverbs_mcast_entry *mcast;
2686         int                           ret = -EINVAL;
2687         bool                          found = false;
2688
2689         if (copy_from_user(&cmd, buf, sizeof cmd))
2690                 return -EFAULT;
2691
2692         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
2693         if (!qp)
2694                 return -EINVAL;
2695
2696         obj = container_of(qp->uobject, struct ib_uqp_object, uevent.uobject);
2697         mutex_lock(&obj->mcast_lock);
2698
2699         list_for_each_entry(mcast, &obj->mcast_list, list)
2700                 if (cmd.mlid == mcast->lid &&
2701                     !memcmp(cmd.gid, mcast->gid.raw, sizeof mcast->gid.raw)) {
2702                         list_del(&mcast->list);
2703                         kfree(mcast);
2704                         found = true;
2705                         break;
2706                 }
2707
2708         if (!found) {
2709                 ret = -EINVAL;
2710                 goto out_put;
2711         }
2712
2713         ret = ib_detach_mcast(qp, (union ib_gid *)cmd.gid, cmd.mlid);
2714
2715 out_put:
2716         mutex_unlock(&obj->mcast_lock);
2717         uobj_put_obj_read(qp);
2718         return ret ? ret : in_len;
2719 }
2720
2721 static int kern_spec_to_ib_spec_action(struct ib_uverbs_flow_spec *kern_spec,
2722                                        union ib_flow_spec *ib_spec)
2723 {
2724         ib_spec->type = kern_spec->type;
2725         switch (ib_spec->type) {
2726         case IB_FLOW_SPEC_ACTION_TAG:
2727                 if (kern_spec->flow_tag.size !=
2728                     sizeof(struct ib_uverbs_flow_spec_action_tag))
2729                         return -EINVAL;
2730
2731                 ib_spec->flow_tag.size = sizeof(struct ib_flow_spec_action_tag);
2732                 ib_spec->flow_tag.tag_id = kern_spec->flow_tag.tag_id;
2733                 break;
2734         case IB_FLOW_SPEC_ACTION_DROP:
2735                 if (kern_spec->drop.size !=
2736                     sizeof(struct ib_uverbs_flow_spec_action_drop))
2737                         return -EINVAL;
2738
2739                 ib_spec->drop.size = sizeof(struct ib_flow_spec_action_drop);
2740                 break;
2741         default:
2742                 return -EINVAL;
2743         }
2744         return 0;
2745 }
2746
2747 static size_t kern_spec_filter_sz(struct ib_uverbs_flow_spec_hdr *spec)
2748 {
2749         /* Returns user space filter size, includes padding */
2750         return (spec->size - sizeof(struct ib_uverbs_flow_spec_hdr)) / 2;
2751 }
2752
2753 static ssize_t spec_filter_size(void *kern_spec_filter, u16 kern_filter_size,
2754                                 u16 ib_real_filter_sz)
2755 {
2756         /*
2757          * User space filter structures must be 64 bit aligned, otherwise this
2758          * may pass, but we won't handle additional new attributes.
2759          */
2760
2761         if (kern_filter_size > ib_real_filter_sz) {
2762                 if (memchr_inv(kern_spec_filter +
2763                                ib_real_filter_sz, 0,
2764                                kern_filter_size - ib_real_filter_sz))
2765                         return -EINVAL;
2766                 return ib_real_filter_sz;
2767         }
2768         return kern_filter_size;
2769 }
2770
2771 static int kern_spec_to_ib_spec_filter(struct ib_uverbs_flow_spec *kern_spec,
2772                                        union ib_flow_spec *ib_spec)
2773 {
2774         ssize_t actual_filter_sz;
2775         ssize_t kern_filter_sz;
2776         ssize_t ib_filter_sz;
2777         void *kern_spec_mask;
2778         void *kern_spec_val;
2779
2780         if (kern_spec->reserved)
2781                 return -EINVAL;
2782
2783         ib_spec->type = kern_spec->type;
2784
2785         kern_filter_sz = kern_spec_filter_sz(&kern_spec->hdr);
2786         /* User flow spec size must be aligned to 4 bytes */
2787         if (kern_filter_sz != ALIGN(kern_filter_sz, 4))
2788                 return -EINVAL;
2789
2790         kern_spec_val = (void *)kern_spec +
2791                 sizeof(struct ib_uverbs_flow_spec_hdr);
2792         kern_spec_mask = kern_spec_val + kern_filter_sz;
2793         if (ib_spec->type == (IB_FLOW_SPEC_INNER | IB_FLOW_SPEC_VXLAN_TUNNEL))
2794                 return -EINVAL;
2795
2796         switch (ib_spec->type & ~IB_FLOW_SPEC_INNER) {
2797         case IB_FLOW_SPEC_ETH:
2798                 ib_filter_sz = offsetof(struct ib_flow_eth_filter, real_sz);
2799                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2800                                                     kern_filter_sz,
2801                                                     ib_filter_sz);
2802                 if (actual_filter_sz <= 0)
2803                         return -EINVAL;
2804                 ib_spec->size = sizeof(struct ib_flow_spec_eth);
2805                 memcpy(&ib_spec->eth.val, kern_spec_val, actual_filter_sz);
2806                 memcpy(&ib_spec->eth.mask, kern_spec_mask, actual_filter_sz);
2807                 break;
2808         case IB_FLOW_SPEC_IPV4:
2809                 ib_filter_sz = offsetof(struct ib_flow_ipv4_filter, real_sz);
2810                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2811                                                     kern_filter_sz,
2812                                                     ib_filter_sz);
2813                 if (actual_filter_sz <= 0)
2814                         return -EINVAL;
2815                 ib_spec->size = sizeof(struct ib_flow_spec_ipv4);
2816                 memcpy(&ib_spec->ipv4.val, kern_spec_val, actual_filter_sz);
2817                 memcpy(&ib_spec->ipv4.mask, kern_spec_mask, actual_filter_sz);
2818                 break;
2819         case IB_FLOW_SPEC_IPV6:
2820                 ib_filter_sz = offsetof(struct ib_flow_ipv6_filter, real_sz);
2821                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2822                                                     kern_filter_sz,
2823                                                     ib_filter_sz);
2824                 if (actual_filter_sz <= 0)
2825                         return -EINVAL;
2826                 ib_spec->size = sizeof(struct ib_flow_spec_ipv6);
2827                 memcpy(&ib_spec->ipv6.val, kern_spec_val, actual_filter_sz);
2828                 memcpy(&ib_spec->ipv6.mask, kern_spec_mask, actual_filter_sz);
2829
2830                 if ((ntohl(ib_spec->ipv6.mask.flow_label)) >= BIT(20) ||
2831                     (ntohl(ib_spec->ipv6.val.flow_label)) >= BIT(20))
2832                         return -EINVAL;
2833                 break;
2834         case IB_FLOW_SPEC_TCP:
2835         case IB_FLOW_SPEC_UDP:
2836                 ib_filter_sz = offsetof(struct ib_flow_tcp_udp_filter, real_sz);
2837                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2838                                                     kern_filter_sz,
2839                                                     ib_filter_sz);
2840                 if (actual_filter_sz <= 0)
2841                         return -EINVAL;
2842                 ib_spec->size = sizeof(struct ib_flow_spec_tcp_udp);
2843                 memcpy(&ib_spec->tcp_udp.val, kern_spec_val, actual_filter_sz);
2844                 memcpy(&ib_spec->tcp_udp.mask, kern_spec_mask, actual_filter_sz);
2845                 break;
2846         case IB_FLOW_SPEC_VXLAN_TUNNEL:
2847                 ib_filter_sz = offsetof(struct ib_flow_tunnel_filter, real_sz);
2848                 actual_filter_sz = spec_filter_size(kern_spec_mask,
2849                                                     kern_filter_sz,
2850                                                     ib_filter_sz);
2851                 if (actual_filter_sz <= 0)
2852                         return -EINVAL;
2853                 ib_spec->tunnel.size = sizeof(struct ib_flow_spec_tunnel);
2854                 memcpy(&ib_spec->tunnel.val, kern_spec_val, actual_filter_sz);
2855                 memcpy(&ib_spec->tunnel.mask, kern_spec_mask, actual_filter_sz);
2856
2857                 if ((ntohl(ib_spec->tunnel.mask.tunnel_id)) >= BIT(24) ||
2858                     (ntohl(ib_spec->tunnel.val.tunnel_id)) >= BIT(24))
2859                         return -EINVAL;
2860                 break;
2861         default:
2862                 return -EINVAL;
2863         }
2864         return 0;
2865 }
2866
2867 static int kern_spec_to_ib_spec(struct ib_uverbs_flow_spec *kern_spec,
2868                                 union ib_flow_spec *ib_spec)
2869 {
2870         if (kern_spec->reserved)
2871                 return -EINVAL;
2872
2873         if (kern_spec->type >= IB_FLOW_SPEC_ACTION_TAG)
2874                 return kern_spec_to_ib_spec_action(kern_spec, ib_spec);
2875         else
2876                 return kern_spec_to_ib_spec_filter(kern_spec, ib_spec);
2877 }
2878
2879 int ib_uverbs_ex_create_wq(struct ib_uverbs_file *file,
2880                            struct ib_device *ib_dev,
2881                            struct ib_udata *ucore,
2882                            struct ib_udata *uhw)
2883 {
2884         struct ib_uverbs_ex_create_wq     cmd = {};
2885         struct ib_uverbs_ex_create_wq_resp resp = {};
2886         struct ib_uwq_object           *obj;
2887         int err = 0;
2888         struct ib_cq *cq;
2889         struct ib_pd *pd;
2890         struct ib_wq *wq;
2891         struct ib_wq_init_attr wq_init_attr = {};
2892         size_t required_cmd_sz;
2893         size_t required_resp_len;
2894
2895         required_cmd_sz = offsetof(typeof(cmd), max_sge) + sizeof(cmd.max_sge);
2896         required_resp_len = offsetof(typeof(resp), wqn) + sizeof(resp.wqn);
2897
2898         if (ucore->inlen < required_cmd_sz)
2899                 return -EINVAL;
2900
2901         if (ucore->outlen < required_resp_len)
2902                 return -ENOSPC;
2903
2904         if (ucore->inlen > sizeof(cmd) &&
2905             !ib_is_udata_cleared(ucore, sizeof(cmd),
2906                                  ucore->inlen - sizeof(cmd)))
2907                 return -EOPNOTSUPP;
2908
2909         err = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
2910         if (err)
2911                 return err;
2912
2913         if (cmd.comp_mask)
2914                 return -EOPNOTSUPP;
2915
2916         obj  = (struct ib_uwq_object *)uobj_alloc(uobj_get_type(wq),
2917                                                   file->ucontext);
2918         if (IS_ERR(obj))
2919                 return PTR_ERR(obj);
2920
2921         pd  = uobj_get_obj_read(pd, cmd.pd_handle, file->ucontext);
2922         if (!pd) {
2923                 err = -EINVAL;
2924                 goto err_uobj;
2925         }
2926
2927         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
2928         if (!cq) {
2929                 err = -EINVAL;
2930                 goto err_put_pd;
2931         }
2932
2933         wq_init_attr.cq = cq;
2934         wq_init_attr.max_sge = cmd.max_sge;
2935         wq_init_attr.max_wr = cmd.max_wr;
2936         wq_init_attr.wq_context = file;
2937         wq_init_attr.wq_type = cmd.wq_type;
2938         wq_init_attr.event_handler = ib_uverbs_wq_event_handler;
2939         if (ucore->inlen >= (offsetof(typeof(cmd), create_flags) +
2940                              sizeof(cmd.create_flags)))
2941                 wq_init_attr.create_flags = cmd.create_flags;
2942         obj->uevent.events_reported = 0;
2943         INIT_LIST_HEAD(&obj->uevent.event_list);
2944         wq = pd->device->create_wq(pd, &wq_init_attr, uhw);
2945         if (IS_ERR(wq)) {
2946                 err = PTR_ERR(wq);
2947                 goto err_put_cq;
2948         }
2949
2950         wq->uobject = &obj->uevent.uobject;
2951         obj->uevent.uobject.object = wq;
2952         wq->wq_type = wq_init_attr.wq_type;
2953         wq->cq = cq;
2954         wq->pd = pd;
2955         wq->device = pd->device;
2956         wq->wq_context = wq_init_attr.wq_context;
2957         atomic_set(&wq->usecnt, 0);
2958         atomic_inc(&pd->usecnt);
2959         atomic_inc(&cq->usecnt);
2960         wq->uobject = &obj->uevent.uobject;
2961         obj->uevent.uobject.object = wq;
2962
2963         memset(&resp, 0, sizeof(resp));
2964         resp.wq_handle = obj->uevent.uobject.id;
2965         resp.max_sge = wq_init_attr.max_sge;
2966         resp.max_wr = wq_init_attr.max_wr;
2967         resp.wqn = wq->wq_num;
2968         resp.response_length = required_resp_len;
2969         err = ib_copy_to_udata(ucore,
2970                                &resp, resp.response_length);
2971         if (err)
2972                 goto err_copy;
2973
2974         uobj_put_obj_read(pd);
2975         uobj_put_obj_read(cq);
2976         uobj_alloc_commit(&obj->uevent.uobject);
2977         return 0;
2978
2979 err_copy:
2980         ib_destroy_wq(wq);
2981 err_put_cq:
2982         uobj_put_obj_read(cq);
2983 err_put_pd:
2984         uobj_put_obj_read(pd);
2985 err_uobj:
2986         uobj_alloc_abort(&obj->uevent.uobject);
2987
2988         return err;
2989 }
2990
2991 int ib_uverbs_ex_destroy_wq(struct ib_uverbs_file *file,
2992                             struct ib_device *ib_dev,
2993                             struct ib_udata *ucore,
2994                             struct ib_udata *uhw)
2995 {
2996         struct ib_uverbs_ex_destroy_wq  cmd = {};
2997         struct ib_uverbs_ex_destroy_wq_resp     resp = {};
2998         struct ib_uobject               *uobj;
2999         struct ib_uwq_object            *obj;
3000         size_t required_cmd_sz;
3001         size_t required_resp_len;
3002         int                             ret;
3003
3004         required_cmd_sz = offsetof(typeof(cmd), wq_handle) + sizeof(cmd.wq_handle);
3005         required_resp_len = offsetof(typeof(resp), reserved) + sizeof(resp.reserved);
3006
3007         if (ucore->inlen < required_cmd_sz)
3008                 return -EINVAL;
3009
3010         if (ucore->outlen < required_resp_len)
3011                 return -ENOSPC;
3012
3013         if (ucore->inlen > sizeof(cmd) &&
3014             !ib_is_udata_cleared(ucore, sizeof(cmd),
3015                                  ucore->inlen - sizeof(cmd)))
3016                 return -EOPNOTSUPP;
3017
3018         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3019         if (ret)
3020                 return ret;
3021
3022         if (cmd.comp_mask)
3023                 return -EOPNOTSUPP;
3024
3025         resp.response_length = required_resp_len;
3026         uobj  = uobj_get_write(uobj_get_type(wq), cmd.wq_handle,
3027                                file->ucontext);
3028         if (IS_ERR(uobj))
3029                 return PTR_ERR(uobj);
3030
3031         obj = container_of(uobj, struct ib_uwq_object, uevent.uobject);
3032         /*
3033          * Make sure we don't free the memory in remove_commit as we still
3034          * needs the uobject memory to create the response.
3035          */
3036         uverbs_uobject_get(uobj);
3037
3038         ret = uobj_remove_commit(uobj);
3039         resp.events_reported = obj->uevent.events_reported;
3040         uverbs_uobject_put(uobj);
3041         if (ret)
3042                 return ret;
3043
3044         return ib_copy_to_udata(ucore, &resp, resp.response_length);
3045 }
3046
3047 int ib_uverbs_ex_modify_wq(struct ib_uverbs_file *file,
3048                            struct ib_device *ib_dev,
3049                            struct ib_udata *ucore,
3050                            struct ib_udata *uhw)
3051 {
3052         struct ib_uverbs_ex_modify_wq cmd = {};
3053         struct ib_wq *wq;
3054         struct ib_wq_attr wq_attr = {};
3055         size_t required_cmd_sz;
3056         int ret;
3057
3058         required_cmd_sz = offsetof(typeof(cmd), curr_wq_state) + sizeof(cmd.curr_wq_state);
3059         if (ucore->inlen < required_cmd_sz)
3060                 return -EINVAL;
3061
3062         if (ucore->inlen > sizeof(cmd) &&
3063             !ib_is_udata_cleared(ucore, sizeof(cmd),
3064                                  ucore->inlen - sizeof(cmd)))
3065                 return -EOPNOTSUPP;
3066
3067         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3068         if (ret)
3069                 return ret;
3070
3071         if (!cmd.attr_mask)
3072                 return -EINVAL;
3073
3074         if (cmd.attr_mask > (IB_WQ_STATE | IB_WQ_CUR_STATE | IB_WQ_FLAGS))
3075                 return -EINVAL;
3076
3077         wq = uobj_get_obj_read(wq, cmd.wq_handle, file->ucontext);
3078         if (!wq)
3079                 return -EINVAL;
3080
3081         wq_attr.curr_wq_state = cmd.curr_wq_state;
3082         wq_attr.wq_state = cmd.wq_state;
3083         if (cmd.attr_mask & IB_WQ_FLAGS) {
3084                 wq_attr.flags = cmd.flags;
3085                 wq_attr.flags_mask = cmd.flags_mask;
3086         }
3087         ret = wq->device->modify_wq(wq, &wq_attr, cmd.attr_mask, uhw);
3088         uobj_put_obj_read(wq);
3089         return ret;
3090 }
3091
3092 int ib_uverbs_ex_create_rwq_ind_table(struct ib_uverbs_file *file,
3093                                       struct ib_device *ib_dev,
3094                                       struct ib_udata *ucore,
3095                                       struct ib_udata *uhw)
3096 {
3097         struct ib_uverbs_ex_create_rwq_ind_table          cmd = {};
3098         struct ib_uverbs_ex_create_rwq_ind_table_resp  resp = {};
3099         struct ib_uobject                 *uobj;
3100         int err = 0;
3101         struct ib_rwq_ind_table_init_attr init_attr = {};
3102         struct ib_rwq_ind_table *rwq_ind_tbl;
3103         struct ib_wq    **wqs = NULL;
3104         u32 *wqs_handles = NULL;
3105         struct ib_wq    *wq = NULL;
3106         int i, j, num_read_wqs;
3107         u32 num_wq_handles;
3108         u32 expected_in_size;
3109         size_t required_cmd_sz_header;
3110         size_t required_resp_len;
3111
3112         required_cmd_sz_header = offsetof(typeof(cmd), log_ind_tbl_size) + sizeof(cmd.log_ind_tbl_size);
3113         required_resp_len = offsetof(typeof(resp), ind_tbl_num) + sizeof(resp.ind_tbl_num);
3114
3115         if (ucore->inlen < required_cmd_sz_header)
3116                 return -EINVAL;
3117
3118         if (ucore->outlen < required_resp_len)
3119                 return -ENOSPC;
3120
3121         err = ib_copy_from_udata(&cmd, ucore, required_cmd_sz_header);
3122         if (err)
3123                 return err;
3124
3125         ucore->inbuf += required_cmd_sz_header;
3126         ucore->inlen -= required_cmd_sz_header;
3127
3128         if (cmd.comp_mask)
3129                 return -EOPNOTSUPP;
3130
3131         if (cmd.log_ind_tbl_size > IB_USER_VERBS_MAX_LOG_IND_TBL_SIZE)
3132                 return -EINVAL;
3133
3134         num_wq_handles = 1 << cmd.log_ind_tbl_size;
3135         expected_in_size = num_wq_handles * sizeof(__u32);
3136         if (num_wq_handles == 1)
3137                 /* input size for wq handles is u64 aligned */
3138                 expected_in_size += sizeof(__u32);
3139
3140         if (ucore->inlen < expected_in_size)
3141                 return -EINVAL;
3142
3143         if (ucore->inlen > expected_in_size &&
3144             !ib_is_udata_cleared(ucore, expected_in_size,
3145                                  ucore->inlen - expected_in_size))
3146                 return -EOPNOTSUPP;
3147
3148         wqs_handles = kcalloc(num_wq_handles, sizeof(*wqs_handles),
3149                               GFP_KERNEL);
3150         if (!wqs_handles)
3151                 return -ENOMEM;
3152
3153         err = ib_copy_from_udata(wqs_handles, ucore,
3154                                  num_wq_handles * sizeof(__u32));
3155         if (err)
3156                 goto err_free;
3157
3158         wqs = kcalloc(num_wq_handles, sizeof(*wqs), GFP_KERNEL);
3159         if (!wqs) {
3160                 err = -ENOMEM;
3161                 goto  err_free;
3162         }
3163
3164         for (num_read_wqs = 0; num_read_wqs < num_wq_handles;
3165                         num_read_wqs++) {
3166                 wq = uobj_get_obj_read(wq, wqs_handles[num_read_wqs],
3167                                        file->ucontext);
3168                 if (!wq) {
3169                         err = -EINVAL;
3170                         goto put_wqs;
3171                 }
3172
3173                 wqs[num_read_wqs] = wq;
3174         }
3175
3176         uobj  = uobj_alloc(uobj_get_type(rwq_ind_table), file->ucontext);
3177         if (IS_ERR(uobj)) {
3178                 err = PTR_ERR(uobj);
3179                 goto put_wqs;
3180         }
3181
3182         init_attr.log_ind_tbl_size = cmd.log_ind_tbl_size;
3183         init_attr.ind_tbl = wqs;
3184         rwq_ind_tbl = ib_dev->create_rwq_ind_table(ib_dev, &init_attr, uhw);
3185
3186         if (IS_ERR(rwq_ind_tbl)) {
3187                 err = PTR_ERR(rwq_ind_tbl);
3188                 goto err_uobj;
3189         }
3190
3191         rwq_ind_tbl->ind_tbl = wqs;
3192         rwq_ind_tbl->log_ind_tbl_size = init_attr.log_ind_tbl_size;
3193         rwq_ind_tbl->uobject = uobj;
3194         uobj->object = rwq_ind_tbl;
3195         rwq_ind_tbl->device = ib_dev;
3196         atomic_set(&rwq_ind_tbl->usecnt, 0);
3197
3198         for (i = 0; i < num_wq_handles; i++)
3199                 atomic_inc(&wqs[i]->usecnt);
3200
3201         resp.ind_tbl_handle = uobj->id;
3202         resp.ind_tbl_num = rwq_ind_tbl->ind_tbl_num;
3203         resp.response_length = required_resp_len;
3204
3205         err = ib_copy_to_udata(ucore,
3206                                &resp, resp.response_length);
3207         if (err)
3208                 goto err_copy;
3209
3210         kfree(wqs_handles);
3211
3212         for (j = 0; j < num_read_wqs; j++)
3213                 uobj_put_obj_read(wqs[j]);
3214
3215         uobj_alloc_commit(uobj);
3216         return 0;
3217
3218 err_copy:
3219         ib_destroy_rwq_ind_table(rwq_ind_tbl);
3220 err_uobj:
3221         uobj_alloc_abort(uobj);
3222 put_wqs:
3223         for (j = 0; j < num_read_wqs; j++)
3224                 uobj_put_obj_read(wqs[j]);
3225 err_free:
3226         kfree(wqs_handles);
3227         kfree(wqs);
3228         return err;
3229 }
3230
3231 int ib_uverbs_ex_destroy_rwq_ind_table(struct ib_uverbs_file *file,
3232                                        struct ib_device *ib_dev,
3233                                        struct ib_udata *ucore,
3234                                        struct ib_udata *uhw)
3235 {
3236         struct ib_uverbs_ex_destroy_rwq_ind_table       cmd = {};
3237         struct ib_uobject               *uobj;
3238         int                     ret;
3239         size_t required_cmd_sz;
3240
3241         required_cmd_sz = offsetof(typeof(cmd), ind_tbl_handle) + sizeof(cmd.ind_tbl_handle);
3242
3243         if (ucore->inlen < required_cmd_sz)
3244                 return -EINVAL;
3245
3246         if (ucore->inlen > sizeof(cmd) &&
3247             !ib_is_udata_cleared(ucore, sizeof(cmd),
3248                                  ucore->inlen - sizeof(cmd)))
3249                 return -EOPNOTSUPP;
3250
3251         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3252         if (ret)
3253                 return ret;
3254
3255         if (cmd.comp_mask)
3256                 return -EOPNOTSUPP;
3257
3258         uobj  = uobj_get_write(uobj_get_type(rwq_ind_table), cmd.ind_tbl_handle,
3259                                file->ucontext);
3260         if (IS_ERR(uobj))
3261                 return PTR_ERR(uobj);
3262
3263         return uobj_remove_commit(uobj);
3264 }
3265
3266 int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
3267                              struct ib_device *ib_dev,
3268                              struct ib_udata *ucore,
3269                              struct ib_udata *uhw)
3270 {
3271         struct ib_uverbs_create_flow      cmd;
3272         struct ib_uverbs_create_flow_resp resp;
3273         struct ib_uobject                 *uobj;
3274         struct ib_flow                    *flow_id;
3275         struct ib_uverbs_flow_attr        *kern_flow_attr;
3276         struct ib_flow_attr               *flow_attr;
3277         struct ib_qp                      *qp;
3278         int err = 0;
3279         void *kern_spec;
3280         void *ib_spec;
3281         int i;
3282
3283         if (ucore->inlen < sizeof(cmd))
3284                 return -EINVAL;
3285
3286         if (ucore->outlen < sizeof(resp))
3287                 return -ENOSPC;
3288
3289         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3290         if (err)
3291                 return err;
3292
3293         ucore->inbuf += sizeof(cmd);
3294         ucore->inlen -= sizeof(cmd);
3295
3296         if (cmd.comp_mask)
3297                 return -EINVAL;
3298
3299         if (!capable(CAP_NET_RAW))
3300                 return -EPERM;
3301
3302         if (cmd.flow_attr.flags >= IB_FLOW_ATTR_FLAGS_RESERVED)
3303                 return -EINVAL;
3304
3305         if ((cmd.flow_attr.flags & IB_FLOW_ATTR_FLAGS_DONT_TRAP) &&
3306             ((cmd.flow_attr.type == IB_FLOW_ATTR_ALL_DEFAULT) ||
3307              (cmd.flow_attr.type == IB_FLOW_ATTR_MC_DEFAULT)))
3308                 return -EINVAL;
3309
3310         if (cmd.flow_attr.num_of_specs > IB_FLOW_SPEC_SUPPORT_LAYERS)
3311                 return -EINVAL;
3312
3313         if (cmd.flow_attr.size > ucore->inlen ||
3314             cmd.flow_attr.size >
3315             (cmd.flow_attr.num_of_specs * sizeof(struct ib_uverbs_flow_spec)))
3316                 return -EINVAL;
3317
3318         if (cmd.flow_attr.reserved[0] ||
3319             cmd.flow_attr.reserved[1])
3320                 return -EINVAL;
3321
3322         if (cmd.flow_attr.num_of_specs) {
3323                 kern_flow_attr = kmalloc(sizeof(*kern_flow_attr) + cmd.flow_attr.size,
3324                                          GFP_KERNEL);
3325                 if (!kern_flow_attr)
3326                         return -ENOMEM;
3327
3328                 memcpy(kern_flow_attr, &cmd.flow_attr, sizeof(*kern_flow_attr));
3329                 err = ib_copy_from_udata(kern_flow_attr + 1, ucore,
3330                                          cmd.flow_attr.size);
3331                 if (err)
3332                         goto err_free_attr;
3333         } else {
3334                 kern_flow_attr = &cmd.flow_attr;
3335         }
3336
3337         uobj  = uobj_alloc(uobj_get_type(flow), file->ucontext);
3338         if (IS_ERR(uobj)) {
3339                 err = PTR_ERR(uobj);
3340                 goto err_free_attr;
3341         }
3342
3343         qp = uobj_get_obj_read(qp, cmd.qp_handle, file->ucontext);
3344         if (!qp) {
3345                 err = -EINVAL;
3346                 goto err_uobj;
3347         }
3348
3349         flow_attr = kzalloc(sizeof(*flow_attr) + cmd.flow_attr.num_of_specs *
3350                             sizeof(union ib_flow_spec), GFP_KERNEL);
3351         if (!flow_attr) {
3352                 err = -ENOMEM;
3353                 goto err_put;
3354         }
3355
3356         flow_attr->type = kern_flow_attr->type;
3357         flow_attr->priority = kern_flow_attr->priority;
3358         flow_attr->num_of_specs = kern_flow_attr->num_of_specs;
3359         flow_attr->port = kern_flow_attr->port;
3360         flow_attr->flags = kern_flow_attr->flags;
3361         flow_attr->size = sizeof(*flow_attr);
3362
3363         kern_spec = kern_flow_attr + 1;
3364         ib_spec = flow_attr + 1;
3365         for (i = 0; i < flow_attr->num_of_specs &&
3366              cmd.flow_attr.size > offsetof(struct ib_uverbs_flow_spec, reserved) &&
3367              cmd.flow_attr.size >=
3368              ((struct ib_uverbs_flow_spec *)kern_spec)->size; i++) {
3369                 err = kern_spec_to_ib_spec(kern_spec, ib_spec);
3370                 if (err)
3371                         goto err_free;
3372                 flow_attr->size +=
3373                         ((union ib_flow_spec *) ib_spec)->size;
3374                 cmd.flow_attr.size -= ((struct ib_uverbs_flow_spec *)kern_spec)->size;
3375                 kern_spec += ((struct ib_uverbs_flow_spec *) kern_spec)->size;
3376                 ib_spec += ((union ib_flow_spec *) ib_spec)->size;
3377         }
3378         if (cmd.flow_attr.size || (i != flow_attr->num_of_specs)) {
3379                 pr_warn("create flow failed, flow %d: %d bytes left from uverb cmd\n",
3380                         i, cmd.flow_attr.size);
3381                 err = -EINVAL;
3382                 goto err_free;
3383         }
3384         flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
3385         if (IS_ERR(flow_id)) {
3386                 err = PTR_ERR(flow_id);
3387                 goto err_free;
3388         }
3389         flow_id->uobject = uobj;
3390         uobj->object = flow_id;
3391
3392         memset(&resp, 0, sizeof(resp));
3393         resp.flow_handle = uobj->id;
3394
3395         err = ib_copy_to_udata(ucore,
3396                                &resp, sizeof(resp));
3397         if (err)
3398                 goto err_copy;
3399
3400         uobj_put_obj_read(qp);
3401         uobj_alloc_commit(uobj);
3402         kfree(flow_attr);
3403         if (cmd.flow_attr.num_of_specs)
3404                 kfree(kern_flow_attr);
3405         return 0;
3406 err_copy:
3407         ib_destroy_flow(flow_id);
3408 err_free:
3409         kfree(flow_attr);
3410 err_put:
3411         uobj_put_obj_read(qp);
3412 err_uobj:
3413         uobj_alloc_abort(uobj);
3414 err_free_attr:
3415         if (cmd.flow_attr.num_of_specs)
3416                 kfree(kern_flow_attr);
3417         return err;
3418 }
3419
3420 int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
3421                               struct ib_device *ib_dev,
3422                               struct ib_udata *ucore,
3423                               struct ib_udata *uhw)
3424 {
3425         struct ib_uverbs_destroy_flow   cmd;
3426         struct ib_uobject               *uobj;
3427         int                             ret;
3428
3429         if (ucore->inlen < sizeof(cmd))
3430                 return -EINVAL;
3431
3432         ret = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3433         if (ret)
3434                 return ret;
3435
3436         if (cmd.comp_mask)
3437                 return -EINVAL;
3438
3439         uobj  = uobj_get_write(uobj_get_type(flow), cmd.flow_handle,
3440                                file->ucontext);
3441         if (IS_ERR(uobj))
3442                 return PTR_ERR(uobj);
3443
3444         ret = uobj_remove_commit(uobj);
3445         return ret;
3446 }
3447
3448 static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
3449                                 struct ib_device *ib_dev,
3450                                 struct ib_uverbs_create_xsrq *cmd,
3451                                 struct ib_udata *udata)
3452 {
3453         struct ib_uverbs_create_srq_resp resp;
3454         struct ib_usrq_object           *obj;
3455         struct ib_pd                    *pd;
3456         struct ib_srq                   *srq;
3457         struct ib_uobject               *uninitialized_var(xrcd_uobj);
3458         struct ib_srq_init_attr          attr;
3459         int ret;
3460
3461         obj  = (struct ib_usrq_object *)uobj_alloc(uobj_get_type(srq),
3462                                                    file->ucontext);
3463         if (IS_ERR(obj))
3464                 return PTR_ERR(obj);
3465
3466         if (cmd->srq_type == IB_SRQT_TM)
3467                 attr.ext.tag_matching.max_num_tags = cmd->max_num_tags;
3468
3469         if (cmd->srq_type == IB_SRQT_XRC) {
3470                 xrcd_uobj = uobj_get_read(uobj_get_type(xrcd), cmd->xrcd_handle,
3471                                           file->ucontext);
3472                 if (IS_ERR(xrcd_uobj)) {
3473                         ret = -EINVAL;
3474                         goto err;
3475                 }
3476
3477                 attr.ext.xrc.xrcd = (struct ib_xrcd *)xrcd_uobj->object;
3478                 if (!attr.ext.xrc.xrcd) {
3479                         ret = -EINVAL;
3480                         goto err_put_xrcd;
3481                 }
3482
3483                 obj->uxrcd = container_of(xrcd_uobj, struct ib_uxrcd_object, uobject);
3484                 atomic_inc(&obj->uxrcd->refcnt);
3485         }
3486
3487         if (ib_srq_has_cq(cmd->srq_type)) {
3488                 attr.ext.cq  = uobj_get_obj_read(cq, cmd->cq_handle,
3489                                                  file->ucontext);
3490                 if (!attr.ext.cq) {
3491                         ret = -EINVAL;
3492                         goto err_put_xrcd;
3493                 }
3494         }
3495
3496         pd  = uobj_get_obj_read(pd, cmd->pd_handle, file->ucontext);
3497         if (!pd) {
3498                 ret = -EINVAL;
3499                 goto err_put_cq;
3500         }
3501
3502         attr.event_handler  = ib_uverbs_srq_event_handler;
3503         attr.srq_context    = file;
3504         attr.srq_type       = cmd->srq_type;
3505         attr.attr.max_wr    = cmd->max_wr;
3506         attr.attr.max_sge   = cmd->max_sge;
3507         attr.attr.srq_limit = cmd->srq_limit;
3508
3509         obj->uevent.events_reported = 0;
3510         INIT_LIST_HEAD(&obj->uevent.event_list);
3511
3512         srq = pd->device->create_srq(pd, &attr, udata);
3513         if (IS_ERR(srq)) {
3514                 ret = PTR_ERR(srq);
3515                 goto err_put;
3516         }
3517
3518         srq->device        = pd->device;
3519         srq->pd            = pd;
3520         srq->srq_type      = cmd->srq_type;
3521         srq->uobject       = &obj->uevent.uobject;
3522         srq->event_handler = attr.event_handler;
3523         srq->srq_context   = attr.srq_context;
3524
3525         if (ib_srq_has_cq(cmd->srq_type)) {
3526                 srq->ext.cq       = attr.ext.cq;
3527                 atomic_inc(&attr.ext.cq->usecnt);
3528         }
3529
3530         if (cmd->srq_type == IB_SRQT_XRC) {
3531                 srq->ext.xrc.xrcd = attr.ext.xrc.xrcd;
3532                 atomic_inc(&attr.ext.xrc.xrcd->usecnt);
3533         }
3534
3535         atomic_inc(&pd->usecnt);
3536         atomic_set(&srq->usecnt, 0);
3537
3538         obj->uevent.uobject.object = srq;
3539         obj->uevent.uobject.user_handle = cmd->user_handle;
3540
3541         memset(&resp, 0, sizeof resp);
3542         resp.srq_handle = obj->uevent.uobject.id;
3543         resp.max_wr     = attr.attr.max_wr;
3544         resp.max_sge    = attr.attr.max_sge;
3545         if (cmd->srq_type == IB_SRQT_XRC)
3546                 resp.srqn = srq->ext.xrc.srq_num;
3547
3548         if (copy_to_user((void __user *) (unsigned long) cmd->response,
3549                          &resp, sizeof resp)) {
3550                 ret = -EFAULT;
3551                 goto err_copy;
3552         }
3553
3554         if (cmd->srq_type == IB_SRQT_XRC)
3555                 uobj_put_read(xrcd_uobj);
3556
3557         if (ib_srq_has_cq(cmd->srq_type))
3558                 uobj_put_obj_read(attr.ext.cq);
3559
3560         uobj_put_obj_read(pd);
3561         uobj_alloc_commit(&obj->uevent.uobject);
3562
3563         return 0;
3564
3565 err_copy:
3566         ib_destroy_srq(srq);
3567
3568 err_put:
3569         uobj_put_obj_read(pd);
3570
3571 err_put_cq:
3572         if (ib_srq_has_cq(cmd->srq_type))
3573                 uobj_put_obj_read(attr.ext.cq);
3574
3575 err_put_xrcd:
3576         if (cmd->srq_type == IB_SRQT_XRC) {
3577                 atomic_dec(&obj->uxrcd->refcnt);
3578                 uobj_put_read(xrcd_uobj);
3579         }
3580
3581 err:
3582         uobj_alloc_abort(&obj->uevent.uobject);
3583         return ret;
3584 }
3585
3586 ssize_t ib_uverbs_create_srq(struct ib_uverbs_file *file,
3587                              struct ib_device *ib_dev,
3588                              const char __user *buf, int in_len,
3589                              int out_len)
3590 {
3591         struct ib_uverbs_create_srq      cmd;
3592         struct ib_uverbs_create_xsrq     xcmd;
3593         struct ib_uverbs_create_srq_resp resp;
3594         struct ib_udata                  udata;
3595         int ret;
3596
3597         if (out_len < sizeof resp)
3598                 return -ENOSPC;
3599
3600         if (copy_from_user(&cmd, buf, sizeof cmd))
3601                 return -EFAULT;
3602
3603         memset(&xcmd, 0, sizeof(xcmd));
3604         xcmd.response    = cmd.response;
3605         xcmd.user_handle = cmd.user_handle;
3606         xcmd.srq_type    = IB_SRQT_BASIC;
3607         xcmd.pd_handle   = cmd.pd_handle;
3608         xcmd.max_wr      = cmd.max_wr;
3609         xcmd.max_sge     = cmd.max_sge;
3610         xcmd.srq_limit   = cmd.srq_limit;
3611
3612         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3613                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3614                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3615                    out_len - sizeof(resp));
3616
3617         ret = __uverbs_create_xsrq(file, ib_dev, &xcmd, &udata);
3618         if (ret)
3619                 return ret;
3620
3621         return in_len;
3622 }
3623
3624 ssize_t ib_uverbs_create_xsrq(struct ib_uverbs_file *file,
3625                               struct ib_device *ib_dev,
3626                               const char __user *buf, int in_len, int out_len)
3627 {
3628         struct ib_uverbs_create_xsrq     cmd;
3629         struct ib_uverbs_create_srq_resp resp;
3630         struct ib_udata                  udata;
3631         int ret;
3632
3633         if (out_len < sizeof resp)
3634                 return -ENOSPC;
3635
3636         if (copy_from_user(&cmd, buf, sizeof cmd))
3637                 return -EFAULT;
3638
3639         ib_uverbs_init_udata(&udata, buf + sizeof(cmd),
3640                    u64_to_user_ptr(cmd.response) + sizeof(resp),
3641                    in_len - sizeof(cmd) - sizeof(struct ib_uverbs_cmd_hdr),
3642                    out_len - sizeof(resp));
3643
3644         ret = __uverbs_create_xsrq(file, ib_dev, &cmd, &udata);
3645         if (ret)
3646                 return ret;
3647
3648         return in_len;
3649 }
3650
3651 ssize_t ib_uverbs_modify_srq(struct ib_uverbs_file *file,
3652                              struct ib_device *ib_dev,
3653                              const char __user *buf, int in_len,
3654                              int out_len)
3655 {
3656         struct ib_uverbs_modify_srq cmd;
3657         struct ib_udata             udata;
3658         struct ib_srq              *srq;
3659         struct ib_srq_attr          attr;
3660         int                         ret;
3661
3662         if (copy_from_user(&cmd, buf, sizeof cmd))
3663                 return -EFAULT;
3664
3665         ib_uverbs_init_udata(&udata, buf + sizeof cmd, NULL, in_len - sizeof cmd,
3666                    out_len);
3667
3668         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3669         if (!srq)
3670                 return -EINVAL;
3671
3672         attr.max_wr    = cmd.max_wr;
3673         attr.srq_limit = cmd.srq_limit;
3674
3675         ret = srq->device->modify_srq(srq, &attr, cmd.attr_mask, &udata);
3676
3677         uobj_put_obj_read(srq);
3678
3679         return ret ? ret : in_len;
3680 }
3681
3682 ssize_t ib_uverbs_query_srq(struct ib_uverbs_file *file,
3683                             struct ib_device *ib_dev,
3684                             const char __user *buf,
3685                             int in_len, int out_len)
3686 {
3687         struct ib_uverbs_query_srq      cmd;
3688         struct ib_uverbs_query_srq_resp resp;
3689         struct ib_srq_attr              attr;
3690         struct ib_srq                   *srq;
3691         int                             ret;
3692
3693         if (out_len < sizeof resp)
3694                 return -ENOSPC;
3695
3696         if (copy_from_user(&cmd, buf, sizeof cmd))
3697                 return -EFAULT;
3698
3699         srq = uobj_get_obj_read(srq, cmd.srq_handle, file->ucontext);
3700         if (!srq)
3701                 return -EINVAL;
3702
3703         ret = ib_query_srq(srq, &attr);
3704
3705         uobj_put_obj_read(srq);
3706
3707         if (ret)
3708                 return ret;
3709
3710         memset(&resp, 0, sizeof resp);
3711
3712         resp.max_wr    = attr.max_wr;
3713         resp.max_sge   = attr.max_sge;
3714         resp.srq_limit = attr.srq_limit;
3715
3716         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof resp))
3717                 return -EFAULT;
3718
3719         return in_len;
3720 }
3721
3722 ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
3723                               struct ib_device *ib_dev,
3724                               const char __user *buf, int in_len,
3725                               int out_len)
3726 {
3727         struct ib_uverbs_destroy_srq      cmd;
3728         struct ib_uverbs_destroy_srq_resp resp;
3729         struct ib_uobject                *uobj;
3730         struct ib_uevent_object          *obj;
3731         int                               ret = -EINVAL;
3732
3733         if (copy_from_user(&cmd, buf, sizeof cmd))
3734                 return -EFAULT;
3735
3736         uobj  = uobj_get_write(uobj_get_type(srq), cmd.srq_handle,
3737                                file->ucontext);
3738         if (IS_ERR(uobj))
3739                 return PTR_ERR(uobj);
3740
3741         obj = container_of(uobj, struct ib_uevent_object, uobject);
3742         /*
3743          * Make sure we don't free the memory in remove_commit as we still
3744          * needs the uobject memory to create the response.
3745          */
3746         uverbs_uobject_get(uobj);
3747
3748         memset(&resp, 0, sizeof(resp));
3749
3750         ret = uobj_remove_commit(uobj);
3751         if (ret) {
3752                 uverbs_uobject_put(uobj);
3753                 return ret;
3754         }
3755         resp.events_reported = obj->events_reported;
3756         uverbs_uobject_put(uobj);
3757         if (copy_to_user(u64_to_user_ptr(cmd.response), &resp, sizeof(resp)))
3758                 return -EFAULT;
3759
3760         return in_len;
3761 }
3762
3763 int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
3764                               struct ib_device *ib_dev,
3765                               struct ib_udata *ucore,
3766                               struct ib_udata *uhw)
3767 {
3768         struct ib_uverbs_ex_query_device_resp resp = { {0} };
3769         struct ib_uverbs_ex_query_device  cmd;
3770         struct ib_device_attr attr = {0};
3771         int err;
3772
3773         if (ucore->inlen < sizeof(cmd))
3774                 return -EINVAL;
3775
3776         err = ib_copy_from_udata(&cmd, ucore, sizeof(cmd));
3777         if (err)
3778                 return err;
3779
3780         if (cmd.comp_mask)
3781                 return -EINVAL;
3782
3783         if (cmd.reserved)
3784                 return -EINVAL;
3785
3786         resp.response_length = offsetof(typeof(resp), odp_caps);
3787
3788         if (ucore->outlen < resp.response_length)
3789                 return -ENOSPC;
3790
3791         err = ib_dev->query_device(ib_dev, &attr, uhw);
3792         if (err)
3793                 return err;
3794
3795         copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
3796
3797         if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
3798                 goto end;
3799
3800 #ifdef CONFIG_INFINIBAND_ON_DEMAND_PAGING
3801         resp.odp_caps.general_caps = attr.odp_caps.general_caps;
3802         resp.odp_caps.per_transport_caps.rc_odp_caps =
3803                 attr.odp_caps.per_transport_caps.rc_odp_caps;
3804         resp.odp_caps.per_transport_caps.uc_odp_caps =
3805                 attr.odp_caps.per_transport_caps.uc_odp_caps;
3806         resp.odp_caps.per_transport_caps.ud_odp_caps =
3807                 attr.odp_caps.per_transport_caps.ud_odp_caps;
3808 #endif
3809         resp.response_length += sizeof(resp.odp_caps);
3810
3811         if (ucore->outlen < resp.response_length + sizeof(resp.timestamp_mask))
3812                 goto end;
3813
3814         resp.timestamp_mask = attr.timestamp_mask;
3815         resp.response_length += sizeof(resp.timestamp_mask);
3816
3817         if (ucore->outlen < resp.response_length + sizeof(resp.hca_core_clock))
3818                 goto end;
3819
3820         resp.hca_core_clock = attr.hca_core_clock;
3821         resp.response_length += sizeof(resp.hca_core_clock);
3822
3823         if (ucore->outlen < resp.response_length + sizeof(resp.device_cap_flags_ex))
3824                 goto end;
3825
3826         resp.device_cap_flags_ex = attr.device_cap_flags;
3827         resp.response_length += sizeof(resp.device_cap_flags_ex);
3828
3829         if (ucore->outlen < resp.response_length + sizeof(resp.rss_caps))
3830                 goto end;
3831
3832         resp.rss_caps.supported_qpts = attr.rss_caps.supported_qpts;
3833         resp.rss_caps.max_rwq_indirection_tables =
3834                 attr.rss_caps.max_rwq_indirection_tables;
3835         resp.rss_caps.max_rwq_indirection_table_size =
3836                 attr.rss_caps.max_rwq_indirection_table_size;
3837
3838         resp.response_length += sizeof(resp.rss_caps);
3839
3840         if (ucore->outlen < resp.response_length + sizeof(resp.max_wq_type_rq))
3841                 goto end;
3842
3843         resp.max_wq_type_rq = attr.max_wq_type_rq;
3844         resp.response_length += sizeof(resp.max_wq_type_rq);
3845
3846         if (ucore->outlen < resp.response_length + sizeof(resp.raw_packet_caps))
3847                 goto end;
3848
3849         resp.raw_packet_caps = attr.raw_packet_caps;
3850         resp.response_length += sizeof(resp.raw_packet_caps);
3851
3852         if (ucore->outlen < resp.response_length + sizeof(resp.tm_caps))
3853                 goto end;
3854
3855         resp.tm_caps.max_rndv_hdr_size  = attr.tm_caps.max_rndv_hdr_size;
3856         resp.tm_caps.max_num_tags       = attr.tm_caps.max_num_tags;
3857         resp.tm_caps.max_ops            = attr.tm_caps.max_ops;
3858         resp.tm_caps.max_sge            = attr.tm_caps.max_sge;
3859         resp.tm_caps.flags              = attr.tm_caps.flags;
3860         resp.response_length += sizeof(resp.tm_caps);
3861
3862         if (ucore->outlen < resp.response_length + sizeof(resp.cq_moderation_caps))
3863                 goto end;
3864
3865         resp.cq_moderation_caps.max_cq_moderation_count  =
3866                 attr.cq_caps.max_cq_moderation_count;
3867         resp.cq_moderation_caps.max_cq_moderation_period =
3868                 attr.cq_caps.max_cq_moderation_period;
3869         resp.response_length += sizeof(resp.cq_moderation_caps);
3870 end:
3871         err = ib_copy_to_udata(ucore, &resp, resp.response_length);
3872         return err;
3873 }
3874
3875 int ib_uverbs_ex_modify_cq(struct ib_uverbs_file *file,
3876                            struct ib_device *ib_dev,
3877                            struct ib_udata *ucore,
3878                            struct ib_udata *uhw)
3879 {
3880         struct ib_uverbs_ex_modify_cq cmd = {};
3881         struct ib_cq *cq;
3882         size_t required_cmd_sz;
3883         int ret;
3884
3885         required_cmd_sz = offsetof(typeof(cmd), reserved) +
3886                                 sizeof(cmd.reserved);
3887         if (ucore->inlen < required_cmd_sz)
3888                 return -EINVAL;
3889
3890         /* sanity checks */
3891         if (ucore->inlen > sizeof(cmd) &&
3892             !ib_is_udata_cleared(ucore, sizeof(cmd),
3893                                  ucore->inlen - sizeof(cmd)))
3894                 return -EOPNOTSUPP;
3895
3896         ret = ib_copy_from_udata(&cmd, ucore, min(sizeof(cmd), ucore->inlen));
3897         if (ret)
3898                 return ret;
3899
3900         if (!cmd.attr_mask || cmd.reserved)
3901                 return -EINVAL;
3902
3903         if (cmd.attr_mask > IB_CQ_MODERATE)
3904                 return -EOPNOTSUPP;
3905
3906         cq = uobj_get_obj_read(cq, cmd.cq_handle, file->ucontext);
3907         if (!cq)
3908                 return -EINVAL;
3909
3910         ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
3911
3912         uobj_put_obj_read(cq);
3913
3914         return ret;
3915 }