root/drivers/infiniband/core/uverbs_std_types.c

DEFINITIONS

1. uverbs_free_ah
2. uverbs_free_flow
3. uverbs_free_mw
4. uverbs_free_qp
5. uverbs_free_rwq_ind_tbl
6. uverbs_free_wq
7. uverbs_free_srq
8. uverbs_free_xrcd
9. uverbs_free_pd
10. uverbs_hot_unplug_completion_event_file
11. uverbs_destroy_def_handler

   1 /*
   2  * Copyright (c) 2017, Mellanox Technologies inc.  All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32 
  33 #include <rdma/uverbs_std_types.h>
  34 #include <rdma/ib_user_verbs.h>
  35 #include <rdma/ib_verbs.h>
  36 #include <linux/bug.h>
  37 #include <linux/file.h>
  38 #include <rdma/restrack.h>
  39 #include "rdma_core.h"
  40 #include "uverbs.h"
  41 
  42 static int uverbs_free_ah(struct ib_uobject *uobject,
  43                           enum rdma_remove_reason why,
  44                           struct uverbs_attr_bundle *attrs)
  45 {
  46         return rdma_destroy_ah_user((struct ib_ah *)uobject->object,
  47                                     RDMA_DESTROY_AH_SLEEPABLE,
  48                                     &attrs->driver_udata);
  49 }
  50 
  51 static int uverbs_free_flow(struct ib_uobject *uobject,
  52                             enum rdma_remove_reason why,
  53                             struct uverbs_attr_bundle *attrs)
  54 {
  55         struct ib_flow *flow = (struct ib_flow *)uobject->object;
  56         struct ib_uflow_object *uflow =
  57                 container_of(uobject, struct ib_uflow_object, uobject);
  58         struct ib_qp *qp = flow->qp;
  59         int ret;
  60 
  61         ret = flow->device->ops.destroy_flow(flow);
  62         if (!ret) {
  63                 if (qp)
  64                         atomic_dec(&qp->usecnt);
  65                 ib_uverbs_flow_resources_free(uflow->resources);
  66         }
  67 
  68         return ret;
  69 }
  70 
  71 static int uverbs_free_mw(struct ib_uobject *uobject,
  72                           enum rdma_remove_reason why,
  73                           struct uverbs_attr_bundle *attrs)
  74 {
  75         return uverbs_dealloc_mw((struct ib_mw *)uobject->object);
  76 }
  77 
  78 static int uverbs_free_qp(struct ib_uobject *uobject,
  79                           enum rdma_remove_reason why,
  80                           struct uverbs_attr_bundle *attrs)
  81 {
  82         struct ib_qp *qp = uobject->object;
  83         struct ib_uqp_object *uqp =
  84                 container_of(uobject, struct ib_uqp_object, uevent.uobject);
  85         int ret;
  86 
  87         /*
  88          * If this is a user triggered destroy then do not allow destruction
  89          * until the user cleans up all the mcast bindings. Unlike in other
  90          * places we forcibly clean up the mcast attachments for !DESTROY
  91          * because the mcast attaches are not ubojects and will not be
  92          * destroyed by anything else during cleanup processing.
  93          */
  94         if (why == RDMA_REMOVE_DESTROY) {
  95                 if (!list_empty(&uqp->mcast_list))
  96                         return -EBUSY;
  97         } else if (qp == qp->real_qp) {
  98                 ib_uverbs_detach_umcast(qp, uqp);
  99         }
 100 
 101         ret = ib_destroy_qp_user(qp, &attrs->driver_udata);
 102         if (ib_is_destroy_retryable(ret, why, uobject))
 103                 return ret;
 104 
 105         if (uqp->uxrcd)
 106                 atomic_dec(&uqp->uxrcd->refcnt);
 107 
 108         ib_uverbs_release_uevent(attrs->ufile, &uqp->uevent);
 109         return ret;
 110 }
 111 
 112 static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject,
 113                                    enum rdma_remove_reason why,
 114                                    struct uverbs_attr_bundle *attrs)
 115 {
 116         struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
 117         struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
 118         int ret;
 119 
 120         ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
 121         if (ib_is_destroy_retryable(ret, why, uobject))
 122                 return ret;
 123 
 124         kfree(ind_tbl);
 125         return ret;
 126 }
 127 
 128 static int uverbs_free_wq(struct ib_uobject *uobject,
 129                           enum rdma_remove_reason why,
 130                           struct uverbs_attr_bundle *attrs)
 131 {
 132         struct ib_wq *wq = uobject->object;
 133         struct ib_uwq_object *uwq =
 134                 container_of(uobject, struct ib_uwq_object, uevent.uobject);
 135         int ret;
 136 
 137         ret = ib_destroy_wq(wq, &attrs->driver_udata);
 138         if (ib_is_destroy_retryable(ret, why, uobject))
 139                 return ret;
 140 
 141         ib_uverbs_release_uevent(attrs->ufile, &uwq->uevent);
 142         return ret;
 143 }
 144 
 145 static int uverbs_free_srq(struct ib_uobject *uobject,
 146                            enum rdma_remove_reason why,
 147                            struct uverbs_attr_bundle *attrs)
 148 {
 149         struct ib_srq *srq = uobject->object;
 150         struct ib_uevent_object *uevent =
 151                 container_of(uobject, struct ib_uevent_object, uobject);
 152         enum ib_srq_type  srq_type = srq->srq_type;
 153         int ret;
 154 
 155         ret = ib_destroy_srq_user(srq, &attrs->driver_udata);
 156         if (ib_is_destroy_retryable(ret, why, uobject))
 157                 return ret;
 158 
 159         if (srq_type == IB_SRQT_XRC) {
 160                 struct ib_usrq_object *us =
 161                         container_of(uevent, struct ib_usrq_object, uevent);
 162 
 163                 atomic_dec(&us->uxrcd->refcnt);
 164         }
 165 
 166         ib_uverbs_release_uevent(attrs->ufile, uevent);
 167         return ret;
 168 }
 169 
 170 static int uverbs_free_xrcd(struct ib_uobject *uobject,
 171                             enum rdma_remove_reason why,
 172                             struct uverbs_attr_bundle *attrs)
 173 {
 174         struct ib_xrcd *xrcd = uobject->object;
 175         struct ib_uxrcd_object *uxrcd =
 176                 container_of(uobject, struct ib_uxrcd_object, uobject);
 177         int ret;
 178 
 179         ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
 180         if (ret)
 181                 return ret;
 182 
 183         mutex_lock(&attrs->ufile->device->xrcd_tree_mutex);
 184         ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why, attrs);
 185         mutex_unlock(&attrs->ufile->device->xrcd_tree_mutex);
 186 
 187         return ret;
 188 }
 189 
 190 static int uverbs_free_pd(struct ib_uobject *uobject,
 191                           enum rdma_remove_reason why,
 192                           struct uverbs_attr_bundle *attrs)
 193 {
 194         struct ib_pd *pd = uobject->object;
 195         int ret;
 196 
 197         ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
 198         if (ret)
 199                 return ret;
 200 
 201         ib_dealloc_pd_user(pd, &attrs->driver_udata);
 202         return 0;
 203 }
 204 
 205 static int uverbs_hot_unplug_completion_event_file(struct ib_uobject *uobj,
 206                                                    enum rdma_remove_reason why)
 207 {
 208         struct ib_uverbs_completion_event_file *comp_event_file =
 209                 container_of(uobj, struct ib_uverbs_completion_event_file,
 210                              uobj);
 211         struct ib_uverbs_event_queue *event_queue = &comp_event_file->ev_queue;
 212 
 213         spin_lock_irq(&event_queue->lock);
 214         event_queue->is_closed = 1;
 215         spin_unlock_irq(&event_queue->lock);
 216 
 217         if (why == RDMA_REMOVE_DRIVER_REMOVE) {
 218                 wake_up_interruptible(&event_queue->poll_wait);
 219                 kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 220         }
 221         return 0;
 222 };
 223 
 224 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
 225 {
 226         return 0;
 227 }
 228 EXPORT_SYMBOL(uverbs_destroy_def_handler);
 229 
 230 DECLARE_UVERBS_NAMED_OBJECT(
 231         UVERBS_OBJECT_COMP_CHANNEL,
 232         UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
 233                              uverbs_hot_unplug_completion_event_file,
 234                              &uverbs_event_fops,
 235                              "[infinibandevent]",
 236                              O_RDONLY));
 237 
 238 DECLARE_UVERBS_NAMED_OBJECT(
 239         UVERBS_OBJECT_QP,
 240         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), uverbs_free_qp));
 241 
 242 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 243         UVERBS_METHOD_MW_DESTROY,
 244         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
 245                         UVERBS_OBJECT_MW,
 246                         UVERBS_ACCESS_DESTROY,
 247                         UA_MANDATORY));
 248 
 249 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
 250                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
 251                             &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
 252 
 253 DECLARE_UVERBS_NAMED_OBJECT(
 254         UVERBS_OBJECT_SRQ,
 255         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object),
 256                                  uverbs_free_srq));
 257 
 258 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 259         UVERBS_METHOD_AH_DESTROY,
 260         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
 261                         UVERBS_OBJECT_AH,
 262                         UVERBS_ACCESS_DESTROY,
 263                         UA_MANDATORY));
 264 
 265 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
 266                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
 267                             &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
 268 
 269 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 270         UVERBS_METHOD_FLOW_DESTROY,
 271         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
 272                         UVERBS_OBJECT_FLOW,
 273                         UVERBS_ACCESS_DESTROY,
 274                         UA_MANDATORY));
 275 
 276 DECLARE_UVERBS_NAMED_OBJECT(
 277         UVERBS_OBJECT_FLOW,
 278         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
 279                                  uverbs_free_flow),
 280                             &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
 281 
 282 DECLARE_UVERBS_NAMED_OBJECT(
 283         UVERBS_OBJECT_WQ,
 284         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), uverbs_free_wq));
 285 
 286 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 287         UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
 288         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
 289                         UVERBS_OBJECT_RWQ_IND_TBL,
 290                         UVERBS_ACCESS_DESTROY,
 291                         UA_MANDATORY));
 292 
 293 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
 294                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
 295                             &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
 296 
 297 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 298         UVERBS_METHOD_XRCD_DESTROY,
 299         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
 300                         UVERBS_OBJECT_XRCD,
 301                         UVERBS_ACCESS_DESTROY,
 302                         UA_MANDATORY));
 303 
 304 DECLARE_UVERBS_NAMED_OBJECT(
 305         UVERBS_OBJECT_XRCD,
 306         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
 307                                  uverbs_free_xrcd),
 308                             &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
 309 
 310 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 311         UVERBS_METHOD_PD_DESTROY,
 312         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
 313                         UVERBS_OBJECT_PD,
 314                         UVERBS_ACCESS_DESTROY,
 315                         UA_MANDATORY));
 316 
 317 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
 318                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
 319                             &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
 320 
 321 const struct uapi_definition uverbs_def_obj_intf[] = {
 322         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
 323                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 324         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
 325                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 326         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_QP,
 327                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_qp)),
 328         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
 329                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
 330         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
 331                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
 332         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_SRQ,
 333                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_srq)),
 334         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
 335                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
 336         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_WQ,
 337                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_wq)),
 338         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 339                 UVERBS_OBJECT_RWQ_IND_TBL,
 340                 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
 341         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
 342                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
 343         {}
 344 };