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
uverbs_free_ah(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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
uverbs_free_flow(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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
uverbs_free_mw(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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
uverbs_free_rwq_ind_tbl(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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 (ib_is_destroy_retryable(ret, why, uobject))
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 ret;
100 }
101
uverbs_free_xrcd(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)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 ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
112 if (ret)
113 return ret;
114
115 mutex_lock(&attrs->ufile->device->xrcd_tree_mutex);
116 ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why, attrs);
117 mutex_unlock(&attrs->ufile->device->xrcd_tree_mutex);
118
119 return ret;
120 }
121
uverbs_free_pd(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)122 static int uverbs_free_pd(struct ib_uobject *uobject,
123 enum rdma_remove_reason why,
124 struct uverbs_attr_bundle *attrs)
125 {
126 struct ib_pd *pd = uobject->object;
127 int ret;
128
129 ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
130 if (ret)
131 return ret;
132
133 return ib_dealloc_pd_user(pd, &attrs->driver_udata);
134 }
135
ib_uverbs_free_event_queue(struct ib_uverbs_event_queue * event_queue)136 void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue)
137 {
138 struct ib_uverbs_event *entry, *tmp;
139
140 spin_lock_irq(&event_queue->lock);
141 /*
142 * The user must ensure that no new items are added to the event_list
143 * once is_closed is set.
144 */
145 event_queue->is_closed = 1;
146 spin_unlock_irq(&event_queue->lock);
147 wake_up_interruptible(&event_queue->poll_wait);
148 kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
149
150 spin_lock_irq(&event_queue->lock);
151 list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) {
152 if (entry->counter)
153 list_del(&entry->obj_list);
154 list_del(&entry->list);
155 kfree(entry);
156 }
157 spin_unlock_irq(&event_queue->lock);
158 }
159
160 static int
uverbs_completion_event_file_destroy_uobj(struct ib_uobject * uobj,enum rdma_remove_reason why)161 uverbs_completion_event_file_destroy_uobj(struct ib_uobject *uobj,
162 enum rdma_remove_reason why)
163 {
164 struct ib_uverbs_completion_event_file *file =
165 container_of(uobj, struct ib_uverbs_completion_event_file,
166 uobj);
167
168 ib_uverbs_free_event_queue(&file->ev_queue);
169 return 0;
170 }
171
uverbs_destroy_def_handler(struct uverbs_attr_bundle * attrs)172 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
173 {
174 return 0;
175 }
176 EXPORT_SYMBOL(uverbs_destroy_def_handler);
177
178 DECLARE_UVERBS_NAMED_OBJECT(
179 UVERBS_OBJECT_COMP_CHANNEL,
180 UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
181 uverbs_completion_event_file_destroy_uobj,
182 &uverbs_event_fops,
183 "[infinibandevent]",
184 O_RDONLY));
185
186 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
187 UVERBS_METHOD_MW_DESTROY,
188 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
189 UVERBS_OBJECT_MW,
190 UVERBS_ACCESS_DESTROY,
191 UA_MANDATORY));
192
193 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
194 UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
195 &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
196
197 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
198 UVERBS_METHOD_AH_DESTROY,
199 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
200 UVERBS_OBJECT_AH,
201 UVERBS_ACCESS_DESTROY,
202 UA_MANDATORY));
203
204 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
205 UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
206 &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
207
208 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
209 UVERBS_METHOD_FLOW_DESTROY,
210 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
211 UVERBS_OBJECT_FLOW,
212 UVERBS_ACCESS_DESTROY,
213 UA_MANDATORY));
214
215 DECLARE_UVERBS_NAMED_OBJECT(
216 UVERBS_OBJECT_FLOW,
217 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
218 uverbs_free_flow),
219 &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
220
221 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
222 UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
223 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
224 UVERBS_OBJECT_RWQ_IND_TBL,
225 UVERBS_ACCESS_DESTROY,
226 UA_MANDATORY));
227
228 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
229 UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
230 &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
231
232 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
233 UVERBS_METHOD_XRCD_DESTROY,
234 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
235 UVERBS_OBJECT_XRCD,
236 UVERBS_ACCESS_DESTROY,
237 UA_MANDATORY));
238
239 DECLARE_UVERBS_NAMED_OBJECT(
240 UVERBS_OBJECT_XRCD,
241 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
242 uverbs_free_xrcd),
243 &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
244
245 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
246 UVERBS_METHOD_PD_DESTROY,
247 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
248 UVERBS_OBJECT_PD,
249 UVERBS_ACCESS_DESTROY,
250 UA_MANDATORY));
251
252 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
253 UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
254 &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
255
256 const struct uapi_definition uverbs_def_obj_intf[] = {
257 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
258 UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
259 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
260 UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
261 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
262 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
263 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
264 UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
265 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
266 UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
267 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
268 UVERBS_OBJECT_RWQ_IND_TBL,
269 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
270 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
271 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
272 {}
273 };
274