drivers/infiniband/core/uverbs_std_types.c

   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(&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(&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(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 void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue)
 206 {
 207         struct ib_uverbs_event *entry, *tmp;
 208
 209         spin_lock_irq(&event_queue->lock);
 210         /*
 211          * The user must ensure that no new items are added to the event_list
 212          * once is_closed is set.
 213          */
 214         event_queue->is_closed = 1;
 215         spin_unlock_irq(&event_queue->lock);
 216         wake_up_interruptible(&event_queue->poll_wait);
 217         kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 218
 219         spin_lock_irq(&event_queue->lock);
 220         list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) {
 221                 if (entry->counter)
 222                         list_del(&entry->obj_list);
 223                 kfree(entry);
 224         }
 225         spin_unlock_irq(&event_queue->lock);
 226 }
 227
 228 static int
 229 uverbs_completion_event_file_destroy_uobj(struct ib_uobject *uobj,
 230                                           enum rdma_remove_reason why)
 231 {
 232         struct ib_uverbs_completion_event_file *file =
 233                 container_of(uobj, struct ib_uverbs_completion_event_file,
 234                              uobj);
 235
 236         ib_uverbs_free_event_queue(&file->ev_queue);
 237         return 0;
 238 }
 239
 240 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
 241 {
 242         return 0;
 243 }
 244 EXPORT_SYMBOL(uverbs_destroy_def_handler);
 245
 246 DECLARE_UVERBS_NAMED_OBJECT(
 247         UVERBS_OBJECT_COMP_CHANNEL,
 248         UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
 249                              uverbs_completion_event_file_destroy_uobj,
 250                              &uverbs_event_fops,
 251                              "[infinibandevent]",
 252                              O_RDONLY));
 253
 254 DECLARE_UVERBS_NAMED_OBJECT(
 255         UVERBS_OBJECT_QP,
 256         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), uverbs_free_qp));
 257
 258 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 259         UVERBS_METHOD_MW_DESTROY,
 260         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
 261                         UVERBS_OBJECT_MW,
 262                         UVERBS_ACCESS_DESTROY,
 263                         UA_MANDATORY));
 264
 265 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
 266                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
 267                             &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
 268
 269 DECLARE_UVERBS_NAMED_OBJECT(
 270         UVERBS_OBJECT_SRQ,
 271         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object),
 272                                  uverbs_free_srq));
 273
 274 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 275         UVERBS_METHOD_AH_DESTROY,
 276         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
 277                         UVERBS_OBJECT_AH,
 278                         UVERBS_ACCESS_DESTROY,
 279                         UA_MANDATORY));
 280
 281 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
 282                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
 283                             &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
 284
 285 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 286         UVERBS_METHOD_FLOW_DESTROY,
 287         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
 288                         UVERBS_OBJECT_FLOW,
 289                         UVERBS_ACCESS_DESTROY,
 290                         UA_MANDATORY));
 291
 292 DECLARE_UVERBS_NAMED_OBJECT(
 293         UVERBS_OBJECT_FLOW,
 294         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
 295                                  uverbs_free_flow),
 296                             &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
 297
 298 DECLARE_UVERBS_NAMED_OBJECT(
 299         UVERBS_OBJECT_WQ,
 300         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), uverbs_free_wq));
 301
 302 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 303         UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
 304         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
 305                         UVERBS_OBJECT_RWQ_IND_TBL,
 306                         UVERBS_ACCESS_DESTROY,
 307                         UA_MANDATORY));
 308
 309 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
 310                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
 311                             &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
 312
 313 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 314         UVERBS_METHOD_XRCD_DESTROY,
 315         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
 316                         UVERBS_OBJECT_XRCD,
 317                         UVERBS_ACCESS_DESTROY,
 318                         UA_MANDATORY));
 319
 320 DECLARE_UVERBS_NAMED_OBJECT(
 321         UVERBS_OBJECT_XRCD,
 322         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
 323                                  uverbs_free_xrcd),
 324                             &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
 325
 326 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 327         UVERBS_METHOD_PD_DESTROY,
 328         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
 329                         UVERBS_OBJECT_PD,
 330                         UVERBS_ACCESS_DESTROY,
 331                         UA_MANDATORY));
 332
 333 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
 334                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
 335                             &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
 336
 337 const struct uapi_definition uverbs_def_obj_intf[] = {
 338         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
 339                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 340         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
 341                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 342         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_QP,
 343                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_qp)),
 344         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
 345                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
 346         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
 347                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
 348         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_SRQ,
 349                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_srq)),
 350         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
 351                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
 352         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_WQ,
 353                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_wq)),
 354         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 355                 UVERBS_OBJECT_RWQ_IND_TBL,
 356                 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
 357         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
 358                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
 359         {}
 360 };