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_rwq_ind_tbl(struct ib_uobject *uobject,
  79                                    enum rdma_remove_reason why,
  80                                    struct uverbs_attr_bundle *attrs)
  81 {
  82         struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
  83         struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
  84         int ret;
  85
  86         ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
  87         if (ib_is_destroy_retryable(ret, why, uobject))
  88                 return ret;
  89
  90         kfree(ind_tbl);
  91         return ret;
  92 }
  93
  94 static int uverbs_free_xrcd(struct ib_uobject *uobject,
  95                             enum rdma_remove_reason why,
  96                             struct uverbs_attr_bundle *attrs)
  97 {
  98         struct ib_xrcd *xrcd = uobject->object;
  99         struct ib_uxrcd_object *uxrcd =
 100                 container_of(uobject, struct ib_uxrcd_object, uobject);
 101         int ret;
 102
 103         ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
 104         if (ret)
 105                 return ret;
 106
 107         mutex_lock(&attrs->ufile->device->xrcd_tree_mutex);
 108         ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why, attrs);
 109         mutex_unlock(&attrs->ufile->device->xrcd_tree_mutex);
 110
 111         return ret;
 112 }
 113
 114 static int uverbs_free_pd(struct ib_uobject *uobject,
 115                           enum rdma_remove_reason why,
 116                           struct uverbs_attr_bundle *attrs)
 117 {
 118         struct ib_pd *pd = uobject->object;
 119         int ret;
 120
 121         ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
 122         if (ret)
 123                 return ret;
 124
 125         ib_dealloc_pd_user(pd, &attrs->driver_udata);
 126         return 0;
 127 }
 128
 129 void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue)
 130 {
 131         struct ib_uverbs_event *entry, *tmp;
 132
 133         spin_lock_irq(&event_queue->lock);
 134         /*
 135          * The user must ensure that no new items are added to the event_list
 136          * once is_closed is set.
 137          */
 138         event_queue->is_closed = 1;
 139         spin_unlock_irq(&event_queue->lock);
 140         wake_up_interruptible(&event_queue->poll_wait);
 141         kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 142
 143         spin_lock_irq(&event_queue->lock);
 144         list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) {
 145                 if (entry->counter)
 146                         list_del(&entry->obj_list);
 147                 list_del(&entry->list);
 148                 kfree(entry);
 149         }
 150         spin_unlock_irq(&event_queue->lock);
 151 }
 152
 153 static int
 154 uverbs_completion_event_file_destroy_uobj(struct ib_uobject *uobj,
 155                                           enum rdma_remove_reason why)
 156 {
 157         struct ib_uverbs_completion_event_file *file =
 158                 container_of(uobj, struct ib_uverbs_completion_event_file,
 159                              uobj);
 160
 161         ib_uverbs_free_event_queue(&file->ev_queue);
 162         return 0;
 163 }
 164
 165 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
 166 {
 167         return 0;
 168 }
 169 EXPORT_SYMBOL(uverbs_destroy_def_handler);
 170
 171 DECLARE_UVERBS_NAMED_OBJECT(
 172         UVERBS_OBJECT_COMP_CHANNEL,
 173         UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
 174                              uverbs_completion_event_file_destroy_uobj,
 175                              &uverbs_event_fops,
 176                              "[infinibandevent]",
 177                              O_RDONLY));
 178
 179 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 180         UVERBS_METHOD_MW_DESTROY,
 181         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
 182                         UVERBS_OBJECT_MW,
 183                         UVERBS_ACCESS_DESTROY,
 184                         UA_MANDATORY));
 185
 186 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
 187                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
 188                             &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
 189
 190 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 191         UVERBS_METHOD_AH_DESTROY,
 192         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
 193                         UVERBS_OBJECT_AH,
 194                         UVERBS_ACCESS_DESTROY,
 195                         UA_MANDATORY));
 196
 197 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
 198                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
 199                             &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
 200
 201 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 202         UVERBS_METHOD_FLOW_DESTROY,
 203         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
 204                         UVERBS_OBJECT_FLOW,
 205                         UVERBS_ACCESS_DESTROY,
 206                         UA_MANDATORY));
 207
 208 DECLARE_UVERBS_NAMED_OBJECT(
 209         UVERBS_OBJECT_FLOW,
 210         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
 211                                  uverbs_free_flow),
 212                             &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
 213
 214 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 215         UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
 216         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
 217                         UVERBS_OBJECT_RWQ_IND_TBL,
 218                         UVERBS_ACCESS_DESTROY,
 219                         UA_MANDATORY));
 220
 221 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
 222                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
 223                             &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
 224
 225 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 226         UVERBS_METHOD_XRCD_DESTROY,
 227         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
 228                         UVERBS_OBJECT_XRCD,
 229                         UVERBS_ACCESS_DESTROY,
 230                         UA_MANDATORY));
 231
 232 DECLARE_UVERBS_NAMED_OBJECT(
 233         UVERBS_OBJECT_XRCD,
 234         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
 235                                  uverbs_free_xrcd),
 236                             &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
 237
 238 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 239         UVERBS_METHOD_PD_DESTROY,
 240         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
 241                         UVERBS_OBJECT_PD,
 242                         UVERBS_ACCESS_DESTROY,
 243                         UA_MANDATORY));
 244
 245 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
 246                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
 247                             &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
 248
 249 const struct uapi_definition uverbs_def_obj_intf[] = {
 250         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
 251                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 252         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
 253                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 254         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
 255                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
 256         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
 257                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
 258         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
 259                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
 260         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 261                 UVERBS_OBJECT_RWQ_IND_TBL,
 262                 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
 263         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
 264                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
 265         {}
 266 };