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         u32 table_size = (1 << rwq_ind_tbl->log_ind_tbl_size);
  85         int ret, i;
  86
  87         if (atomic_read(&rwq_ind_tbl->usecnt))
  88                 return -EBUSY;
  89
  90         ret = rwq_ind_tbl->device->ops.destroy_rwq_ind_table(rwq_ind_tbl);
  91         if (ret)
  92                 return ret;
  93
  94         for (i = 0; i < table_size; i++)
  95                 atomic_dec(&ind_tbl[i]->usecnt);
  96
  97         kfree(rwq_ind_tbl);
  98         kfree(ind_tbl);
  99         return 0;
 100 }
 101
 102 static int uverbs_free_xrcd(struct ib_uobject *uobject,
 103                             enum rdma_remove_reason why,
 104                             struct uverbs_attr_bundle *attrs)
 105 {
 106         struct ib_xrcd *xrcd = uobject->object;
 107         struct ib_uxrcd_object *uxrcd =
 108                 container_of(uobject, struct ib_uxrcd_object, uobject);
 109         int ret;
 110
 111         if (atomic_read(&uxrcd->refcnt))
 112                 return -EBUSY;
 113
 114         mutex_lock(&attrs->ufile->device->xrcd_tree_mutex);
 115         ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why, attrs);
 116         mutex_unlock(&attrs->ufile->device->xrcd_tree_mutex);
 117
 118         return ret;
 119 }
 120
 121 static int uverbs_free_pd(struct ib_uobject *uobject,
 122                           enum rdma_remove_reason why,
 123                           struct uverbs_attr_bundle *attrs)
 124 {
 125         struct ib_pd *pd = uobject->object;
 126
 127         if (atomic_read(&pd->usecnt))
 128                 return -EBUSY;
 129
 130         return ib_dealloc_pd_user(pd, &attrs->driver_udata);
 131 }
 132
 133 void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue)
 134 {
 135         struct ib_uverbs_event *entry, *tmp;
 136
 137         spin_lock_irq(&event_queue->lock);
 138         /*
 139          * The user must ensure that no new items are added to the event_list
 140          * once is_closed is set.
 141          */
 142         event_queue->is_closed = 1;
 143         spin_unlock_irq(&event_queue->lock);
 144         wake_up_interruptible(&event_queue->poll_wait);
 145         kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
 146
 147         spin_lock_irq(&event_queue->lock);
 148         list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) {
 149                 if (entry->counter)
 150                         list_del(&entry->obj_list);
 151                 list_del(&entry->list);
 152                 kfree(entry);
 153         }
 154         spin_unlock_irq(&event_queue->lock);
 155 }
 156
 157 static void
 158 uverbs_completion_event_file_destroy_uobj(struct ib_uobject *uobj,
 159                                           enum rdma_remove_reason why)
 160 {
 161         struct ib_uverbs_completion_event_file *file =
 162                 container_of(uobj, struct ib_uverbs_completion_event_file,
 163                              uobj);
 164
 165         ib_uverbs_free_event_queue(&file->ev_queue);
 166 }
 167
 168 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
 169 {
 170         return 0;
 171 }
 172 EXPORT_SYMBOL(uverbs_destroy_def_handler);
 173
 174 DECLARE_UVERBS_NAMED_OBJECT(
 175         UVERBS_OBJECT_COMP_CHANNEL,
 176         UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
 177                              uverbs_completion_event_file_destroy_uobj,
 178                              &uverbs_event_fops,
 179                              "[infinibandevent]",
 180                              O_RDONLY));
 181
 182 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 183         UVERBS_METHOD_MW_DESTROY,
 184         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
 185                         UVERBS_OBJECT_MW,
 186                         UVERBS_ACCESS_DESTROY,
 187                         UA_MANDATORY));
 188
 189 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
 190                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
 191                             &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
 192
 193 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 194         UVERBS_METHOD_AH_DESTROY,
 195         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
 196                         UVERBS_OBJECT_AH,
 197                         UVERBS_ACCESS_DESTROY,
 198                         UA_MANDATORY));
 199
 200 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
 201                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
 202                             &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
 203
 204 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 205         UVERBS_METHOD_FLOW_DESTROY,
 206         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
 207                         UVERBS_OBJECT_FLOW,
 208                         UVERBS_ACCESS_DESTROY,
 209                         UA_MANDATORY));
 210
 211 DECLARE_UVERBS_NAMED_OBJECT(
 212         UVERBS_OBJECT_FLOW,
 213         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
 214                                  uverbs_free_flow),
 215                             &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
 216
 217 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 218         UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
 219         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
 220                         UVERBS_OBJECT_RWQ_IND_TBL,
 221                         UVERBS_ACCESS_DESTROY,
 222                         UA_MANDATORY));
 223
 224 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
 225                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
 226                             &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
 227
 228 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 229         UVERBS_METHOD_XRCD_DESTROY,
 230         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
 231                         UVERBS_OBJECT_XRCD,
 232                         UVERBS_ACCESS_DESTROY,
 233                         UA_MANDATORY));
 234
 235 DECLARE_UVERBS_NAMED_OBJECT(
 236         UVERBS_OBJECT_XRCD,
 237         UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
 238                                  uverbs_free_xrcd),
 239                             &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
 240
 241 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
 242         UVERBS_METHOD_PD_DESTROY,
 243         UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
 244                         UVERBS_OBJECT_PD,
 245                         UVERBS_ACCESS_DESTROY,
 246                         UA_MANDATORY));
 247
 248 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
 249                             UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
 250                             &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
 251
 252 const struct uapi_definition uverbs_def_obj_intf[] = {
 253         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
 254                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 255         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
 256                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
 257         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
 258                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
 259         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
 260                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
 261         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
 262                                       UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
 263         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
 264                 UVERBS_OBJECT_RWQ_IND_TBL,
 265                 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
 266         UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
 267                                       UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
 268         {}
 269 };