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/file.h>
37 #include "rdma_core.h"
38 #include "uverbs.h"
39
uverbs_free_ah(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)40 static int uverbs_free_ah(struct ib_uobject *uobject,
41 enum rdma_remove_reason why,
42 struct uverbs_attr_bundle *attrs)
43 {
44 return ib_destroy_ah_user((struct ib_ah *)uobject->object,
45 RDMA_DESTROY_AH_SLEEPABLE,
46 &attrs->driver_udata);
47 }
48
uverbs_free_flow(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)49 static int uverbs_free_flow(struct ib_uobject *uobject,
50 enum rdma_remove_reason why,
51 struct uverbs_attr_bundle *attrs)
52 {
53 struct ib_flow *flow = (struct ib_flow *)uobject->object;
54 struct ib_uflow_object *uflow =
55 container_of(uobject, struct ib_uflow_object, uobject);
56 struct ib_qp *qp = flow->qp;
57 int ret;
58
59 ret = flow->device->destroy_flow(flow);
60 if (!ret) {
61 if (qp)
62 atomic_dec(&qp->usecnt);
63 ib_uverbs_flow_resources_free(uflow->resources);
64 }
65
66 return ret;
67 }
68
uverbs_free_mw(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)69 static int uverbs_free_mw(struct ib_uobject *uobject,
70 enum rdma_remove_reason why,
71 struct uverbs_attr_bundle *attrs)
72 {
73 return uverbs_dealloc_mw((struct ib_mw *)uobject->object);
74 }
75
uverbs_free_qp(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)76 static int uverbs_free_qp(struct ib_uobject *uobject,
77 enum rdma_remove_reason why,
78 struct uverbs_attr_bundle *attrs)
79 {
80 struct ib_qp *qp = uobject->object;
81 struct ib_uqp_object *uqp =
82 container_of(uobject, struct ib_uqp_object, uevent.uobject);
83 int ret;
84
85 /*
86 * If this is a user triggered destroy then do not allow destruction
87 * until the user cleans up all the mcast bindings. Unlike in other
88 * places we forcibly clean up the mcast attachments for !DESTROY
89 * because the mcast attaches are not ubojects and will not be
90 * destroyed by anything else during cleanup processing.
91 */
92 if (why == RDMA_REMOVE_DESTROY) {
93 if (!list_empty(&uqp->mcast_list))
94 return -EBUSY;
95 } else if (qp == qp->real_qp) {
96 ib_uverbs_detach_umcast(qp, uqp);
97 }
98
99 ret = ib_destroy_qp_user(qp, &attrs->driver_udata);
100 if (ib_is_destroy_retryable(ret, why, uobject))
101 return ret;
102
103 if (uqp->uxrcd)
104 atomic_dec(&uqp->uxrcd->refcnt);
105
106 ib_uverbs_release_uevent(&uqp->uevent);
107 return ret;
108 }
109
uverbs_free_rwq_ind_tbl(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)110 static int uverbs_free_rwq_ind_tbl(struct ib_uobject *uobject,
111 enum rdma_remove_reason why,
112 struct uverbs_attr_bundle *attrs)
113 {
114 struct ib_rwq_ind_table *rwq_ind_tbl = uobject->object;
115 struct ib_wq **ind_tbl = rwq_ind_tbl->ind_tbl;
116 int ret;
117
118 ret = ib_destroy_rwq_ind_table(rwq_ind_tbl);
119 if (ib_is_destroy_retryable(ret, why, uobject))
120 return ret;
121
122 kfree(ind_tbl);
123 return ret;
124 }
125
uverbs_free_wq(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)126 static int uverbs_free_wq(struct ib_uobject *uobject,
127 enum rdma_remove_reason why,
128 struct uverbs_attr_bundle *attrs)
129 {
130 struct ib_wq *wq = uobject->object;
131 struct ib_uwq_object *uwq =
132 container_of(uobject, struct ib_uwq_object, uevent.uobject);
133 int ret;
134
135 ret = ib_destroy_wq(wq, &attrs->driver_udata);
136 if (ib_is_destroy_retryable(ret, why, uobject))
137 return ret;
138
139 ib_uverbs_release_uevent(&uwq->uevent);
140 return ret;
141 }
142
uverbs_free_srq(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)143 static int uverbs_free_srq(struct ib_uobject *uobject,
144 enum rdma_remove_reason why,
145 struct uverbs_attr_bundle *attrs)
146 {
147 struct ib_srq *srq = uobject->object;
148 struct ib_uevent_object *uevent =
149 container_of(uobject, struct ib_uevent_object, uobject);
150 enum ib_srq_type srq_type = srq->srq_type;
151 int ret;
152
153 ret = ib_destroy_srq_user(srq, &attrs->driver_udata);
154 if (ib_is_destroy_retryable(ret, why, uobject))
155 return ret;
156
157 if (srq_type == IB_SRQT_XRC) {
158 struct ib_usrq_object *us =
159 container_of(uevent, struct ib_usrq_object, uevent);
160
161 atomic_dec(&us->uxrcd->refcnt);
162 }
163
164 ib_uverbs_release_uevent(uevent);
165 return ret;
166 }
167
uverbs_free_xrcd(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)168 static int uverbs_free_xrcd(struct ib_uobject *uobject,
169 enum rdma_remove_reason why,
170 struct uverbs_attr_bundle *attrs)
171 {
172 struct ib_xrcd *xrcd = uobject->object;
173 struct ib_uxrcd_object *uxrcd =
174 container_of(uobject, struct ib_uxrcd_object, uobject);
175 int ret;
176
177 ret = ib_destroy_usecnt(&uxrcd->refcnt, why, uobject);
178 if (ret)
179 return ret;
180
181 mutex_lock(&attrs->ufile->device->xrcd_tree_mutex);
182 ret = ib_uverbs_dealloc_xrcd(uobject, xrcd, why, attrs);
183 mutex_unlock(&attrs->ufile->device->xrcd_tree_mutex);
184
185 return ret;
186 }
187
uverbs_free_pd(struct ib_uobject * uobject,enum rdma_remove_reason why,struct uverbs_attr_bundle * attrs)188 static int uverbs_free_pd(struct ib_uobject *uobject,
189 enum rdma_remove_reason why,
190 struct uverbs_attr_bundle *attrs)
191 {
192 struct ib_pd *pd = uobject->object;
193 int ret;
194
195 ret = ib_destroy_usecnt(&pd->usecnt, why, uobject);
196 if (ret)
197 return ret;
198
199 ib_dealloc_pd_user(pd, &attrs->driver_udata);
200 return 0;
201 }
202
ib_uverbs_free_event_queue(struct ib_uverbs_event_queue * event_queue)203 void ib_uverbs_free_event_queue(struct ib_uverbs_event_queue *event_queue)
204 {
205 struct ib_uverbs_event *entry, *tmp;
206
207 spin_lock_irq(&event_queue->lock);
208 /*
209 * The user must ensure that no new items are added to the event_list
210 * once is_closed is set.
211 */
212 event_queue->is_closed = 1;
213 spin_unlock_irq(&event_queue->lock);
214 wake_up_interruptible(&event_queue->poll_wait);
215 kill_fasync(&event_queue->async_queue, SIGIO, POLL_IN);
216
217 spin_lock_irq(&event_queue->lock);
218 list_for_each_entry_safe(entry, tmp, &event_queue->event_list, list) {
219 if (entry->counter)
220 list_del(&entry->obj_list);
221 list_del(&entry->list);
222 kfree(entry);
223 }
224 spin_unlock_irq(&event_queue->lock);
225 }
226
227 static int
uverbs_completion_event_file_destroy_uobj(struct ib_uobject * uobj,enum rdma_remove_reason why)228 uverbs_completion_event_file_destroy_uobj(struct ib_uobject *uobj,
229 enum rdma_remove_reason why)
230 {
231 struct ib_uverbs_completion_event_file *file =
232 container_of(uobj, struct ib_uverbs_completion_event_file,
233 uobj);
234
235 ib_uverbs_free_event_queue(&file->ev_queue);
236 return 0;
237 }
238
uverbs_destroy_def_handler(struct uverbs_attr_bundle * attrs)239 int uverbs_destroy_def_handler(struct uverbs_attr_bundle *attrs)
240 {
241 return 0;
242 }
243 EXPORT_SYMBOL(uverbs_destroy_def_handler);
244
245 DECLARE_UVERBS_NAMED_OBJECT(
246 UVERBS_OBJECT_COMP_CHANNEL,
247 UVERBS_TYPE_ALLOC_FD(sizeof(struct ib_uverbs_completion_event_file),
248 uverbs_completion_event_file_destroy_uobj,
249 &uverbs_event_fops,
250 "[infinibandevent]",
251 FMODE_READ));
252
253 DECLARE_UVERBS_NAMED_OBJECT(
254 UVERBS_OBJECT_QP,
255 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uqp_object), uverbs_free_qp));
256
257 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
258 UVERBS_METHOD_MW_DESTROY,
259 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_MW_HANDLE,
260 UVERBS_OBJECT_MW,
261 UVERBS_ACCESS_DESTROY,
262 UA_MANDATORY));
263
264 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_MW,
265 UVERBS_TYPE_ALLOC_IDR(uverbs_free_mw),
266 &UVERBS_METHOD(UVERBS_METHOD_MW_DESTROY));
267
268 DECLARE_UVERBS_NAMED_OBJECT(
269 UVERBS_OBJECT_SRQ,
270 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_usrq_object),
271 uverbs_free_srq));
272
273 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
274 UVERBS_METHOD_AH_DESTROY,
275 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_AH_HANDLE,
276 UVERBS_OBJECT_AH,
277 UVERBS_ACCESS_DESTROY,
278 UA_MANDATORY));
279
280 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_AH,
281 UVERBS_TYPE_ALLOC_IDR(uverbs_free_ah),
282 &UVERBS_METHOD(UVERBS_METHOD_AH_DESTROY));
283
284 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
285 UVERBS_METHOD_FLOW_DESTROY,
286 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_FLOW_HANDLE,
287 UVERBS_OBJECT_FLOW,
288 UVERBS_ACCESS_DESTROY,
289 UA_MANDATORY));
290
291 DECLARE_UVERBS_NAMED_OBJECT(
292 UVERBS_OBJECT_FLOW,
293 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uflow_object),
294 uverbs_free_flow),
295 &UVERBS_METHOD(UVERBS_METHOD_FLOW_DESTROY));
296
297 DECLARE_UVERBS_NAMED_OBJECT(
298 UVERBS_OBJECT_WQ,
299 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uwq_object), uverbs_free_wq));
300
301 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
302 UVERBS_METHOD_RWQ_IND_TBL_DESTROY,
303 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_RWQ_IND_TBL_HANDLE,
304 UVERBS_OBJECT_RWQ_IND_TBL,
305 UVERBS_ACCESS_DESTROY,
306 UA_MANDATORY));
307
308 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_RWQ_IND_TBL,
309 UVERBS_TYPE_ALLOC_IDR(uverbs_free_rwq_ind_tbl),
310 &UVERBS_METHOD(UVERBS_METHOD_RWQ_IND_TBL_DESTROY));
311
312 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
313 UVERBS_METHOD_XRCD_DESTROY,
314 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_XRCD_HANDLE,
315 UVERBS_OBJECT_XRCD,
316 UVERBS_ACCESS_DESTROY,
317 UA_MANDATORY));
318
319 DECLARE_UVERBS_NAMED_OBJECT(
320 UVERBS_OBJECT_XRCD,
321 UVERBS_TYPE_ALLOC_IDR_SZ(sizeof(struct ib_uxrcd_object),
322 uverbs_free_xrcd),
323 &UVERBS_METHOD(UVERBS_METHOD_XRCD_DESTROY));
324
325 DECLARE_UVERBS_NAMED_METHOD_DESTROY(
326 UVERBS_METHOD_PD_DESTROY,
327 UVERBS_ATTR_IDR(UVERBS_ATTR_DESTROY_PD_HANDLE,
328 UVERBS_OBJECT_PD,
329 UVERBS_ACCESS_DESTROY,
330 UA_MANDATORY));
331
332 DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD,
333 UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd),
334 &UVERBS_METHOD(UVERBS_METHOD_PD_DESTROY));
335
336 const struct uapi_definition uverbs_def_obj_intf[] = {
337 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD,
338 UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
339 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL,
340 UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)),
341 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_QP,
342 UAPI_DEF_OBJ_NEEDS_FN(destroy_qp)),
343 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_AH,
344 UAPI_DEF_OBJ_NEEDS_FN(destroy_ah)),
345 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_MW,
346 UAPI_DEF_OBJ_NEEDS_FN(dealloc_mw)),
347 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_SRQ,
348 UAPI_DEF_OBJ_NEEDS_FN(destroy_srq)),
349 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_FLOW,
350 UAPI_DEF_OBJ_NEEDS_FN(destroy_flow)),
351 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_WQ,
352 UAPI_DEF_OBJ_NEEDS_FN(destroy_wq)),
353 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(
354 UVERBS_OBJECT_RWQ_IND_TBL,
355 UAPI_DEF_OBJ_NEEDS_FN(destroy_rwq_ind_table)),
356 UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_XRCD,
357 UAPI_DEF_OBJ_NEEDS_FN(dealloc_xrcd)),
358 {}
359 };
360