1/*
2 * Copyright (c) 2016 Mellanox Technologies Ltd. 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 <linux/security.h>
34#include <linux/completion.h>
35#include <linux/list.h>
36
37#include <rdma/ib_verbs.h>
38#include <rdma/ib_cache.h>
39#include "core_priv.h"
40#include "mad_priv.h"
41
42static LIST_HEAD(mad_agent_list);
43/* Lock to protect mad_agent_list */
44static DEFINE_SPINLOCK(mad_agent_list_lock);
45
46static struct pkey_index_qp_list *get_pkey_idx_qp_list(struct ib_port_pkey *pp)
47{
48 struct pkey_index_qp_list *pkey = NULL;
49 struct pkey_index_qp_list *tmp_pkey;
50 struct ib_device *dev = pp->sec->dev;
51
52 spin_lock(lock: &dev->port_data[pp->port_num].pkey_list_lock);
53 list_for_each_entry (tmp_pkey, &dev->port_data[pp->port_num].pkey_list,
54 pkey_index_list) {
55 if (tmp_pkey->pkey_index == pp->pkey_index) {
56 pkey = tmp_pkey;
57 break;
58 }
59 }
60 spin_unlock(lock: &dev->port_data[pp->port_num].pkey_list_lock);
61 return pkey;
62}
63
64static int get_pkey_and_subnet_prefix(struct ib_port_pkey *pp,
65 u16 *pkey,
66 u64 *subnet_prefix)
67{
68 struct ib_device *dev = pp->sec->dev;
69 int ret;
70
71 ret = ib_get_cached_pkey(device_handle: dev, port_num: pp->port_num, index: pp->pkey_index, pkey);
72 if (ret)
73 return ret;
74
75 ib_get_cached_subnet_prefix(device: dev, port_num: pp->port_num, sn_pfx: subnet_prefix);
76
77 return ret;
78}
79
80static int enforce_qp_pkey_security(u16 pkey,
81 u64 subnet_prefix,
82 struct ib_qp_security *qp_sec)
83{
84 struct ib_qp_security *shared_qp_sec;
85 int ret;
86
87 ret = security_ib_pkey_access(sec: qp_sec->security, subnet_prefix, pkey);
88 if (ret)
89 return ret;
90
91 list_for_each_entry(shared_qp_sec,
92 &qp_sec->shared_qp_list,
93 shared_qp_list) {
94 ret = security_ib_pkey_access(sec: shared_qp_sec->security,
95 subnet_prefix,
96 pkey);
97 if (ret)
98 return ret;
99 }
100 return 0;
101}
102
103/* The caller of this function must hold the QP security
104 * mutex of the QP of the security structure in *pps.
105 *
106 * It takes separate ports_pkeys and security structure
107 * because in some cases the pps will be for a new settings
108 * or the pps will be for the real QP and security structure
109 * will be for a shared QP.
110 */
111static int check_qp_port_pkey_settings(struct ib_ports_pkeys *pps,
112 struct ib_qp_security *sec)
113{
114 u64 subnet_prefix;
115 u16 pkey;
116 int ret = 0;
117
118 if (!pps)
119 return 0;
120
121 if (pps->main.state != IB_PORT_PKEY_NOT_VALID) {
122 ret = get_pkey_and_subnet_prefix(pp: &pps->main,
123 pkey: &pkey,
124 subnet_prefix: &subnet_prefix);
125 if (ret)
126 return ret;
127
128 ret = enforce_qp_pkey_security(pkey,
129 subnet_prefix,
130 qp_sec: sec);
131 if (ret)
132 return ret;
133 }
134
135 if (pps->alt.state != IB_PORT_PKEY_NOT_VALID) {
136 ret = get_pkey_and_subnet_prefix(pp: &pps->alt,
137 pkey: &pkey,
138 subnet_prefix: &subnet_prefix);
139 if (ret)
140 return ret;
141
142 ret = enforce_qp_pkey_security(pkey,
143 subnet_prefix,
144 qp_sec: sec);
145 }
146
147 return ret;
148}
149
150/* The caller of this function must hold the QP security
151 * mutex.
152 */
153static void qp_to_error(struct ib_qp_security *sec)
154{
155 struct ib_qp_security *shared_qp_sec;
156 struct ib_qp_attr attr = {
157 .qp_state = IB_QPS_ERR
158 };
159 struct ib_event event = {
160 .event = IB_EVENT_QP_FATAL
161 };
162
163 /* If the QP is in the process of being destroyed
164 * the qp pointer in the security structure is
165 * undefined. It cannot be modified now.
166 */
167 if (sec->destroying)
168 return;
169
170 ib_modify_qp(qp: sec->qp,
171 qp_attr: &attr,
172 qp_attr_mask: IB_QP_STATE);
173
174 if (sec->qp->event_handler && sec->qp->qp_context) {
175 event.element.qp = sec->qp;
176 sec->qp->event_handler(&event,
177 sec->qp->qp_context);
178 }
179
180 list_for_each_entry(shared_qp_sec,
181 &sec->shared_qp_list,
182 shared_qp_list) {
183 struct ib_qp *qp = shared_qp_sec->qp;
184
185 if (qp->event_handler && qp->qp_context) {
186 event.element.qp = qp;
187 event.device = qp->device;
188 qp->event_handler(&event,
189 qp->qp_context);
190 }
191 }
192}
193
194static inline void check_pkey_qps(struct pkey_index_qp_list *pkey,
195 struct ib_device *device,
196 u32 port_num,
197 u64 subnet_prefix)
198{
199 struct ib_port_pkey *pp, *tmp_pp;
200 bool comp;
201 LIST_HEAD(to_error_list);
202 u16 pkey_val;
203
204 if (!ib_get_cached_pkey(device_handle: device,
205 port_num,
206 index: pkey->pkey_index,
207 pkey: &pkey_val)) {
208 spin_lock(lock: &pkey->qp_list_lock);
209 list_for_each_entry(pp, &pkey->qp_list, qp_list) {
210 if (atomic_read(v: &pp->sec->error_list_count))
211 continue;
212
213 if (enforce_qp_pkey_security(pkey: pkey_val,
214 subnet_prefix,
215 qp_sec: pp->sec)) {
216 atomic_inc(v: &pp->sec->error_list_count);
217 list_add(new: &pp->to_error_list,
218 head: &to_error_list);
219 }
220 }
221 spin_unlock(lock: &pkey->qp_list_lock);
222 }
223
224 list_for_each_entry_safe(pp,
225 tmp_pp,
226 &to_error_list,
227 to_error_list) {
228 mutex_lock(&pp->sec->mutex);
229 qp_to_error(sec: pp->sec);
230 list_del(entry: &pp->to_error_list);
231 atomic_dec(v: &pp->sec->error_list_count);
232 comp = pp->sec->destroying;
233 mutex_unlock(lock: &pp->sec->mutex);
234
235 if (comp)
236 complete(&pp->sec->error_complete);
237 }
238}
239
240/* The caller of this function must hold the QP security
241 * mutex.
242 */
243static int port_pkey_list_insert(struct ib_port_pkey *pp)
244{
245 struct pkey_index_qp_list *tmp_pkey;
246 struct pkey_index_qp_list *pkey;
247 struct ib_device *dev;
248 u32 port_num = pp->port_num;
249 int ret = 0;
250
251 if (pp->state != IB_PORT_PKEY_VALID)
252 return 0;
253
254 dev = pp->sec->dev;
255
256 pkey = get_pkey_idx_qp_list(pp);
257
258 if (!pkey) {
259 bool found = false;
260
261 pkey = kzalloc(sizeof(*pkey), GFP_KERNEL);
262 if (!pkey)
263 return -ENOMEM;
264
265 spin_lock(lock: &dev->port_data[port_num].pkey_list_lock);
266 /* Check for the PKey again. A racing process may
267 * have created it.
268 */
269 list_for_each_entry(tmp_pkey,
270 &dev->port_data[port_num].pkey_list,
271 pkey_index_list) {
272 if (tmp_pkey->pkey_index == pp->pkey_index) {
273 kfree(objp: pkey);
274 pkey = tmp_pkey;
275 found = true;
276 break;
277 }
278 }
279
280 if (!found) {
281 pkey->pkey_index = pp->pkey_index;
282 spin_lock_init(&pkey->qp_list_lock);
283 INIT_LIST_HEAD(list: &pkey->qp_list);
284 list_add(new: &pkey->pkey_index_list,
285 head: &dev->port_data[port_num].pkey_list);
286 }
287 spin_unlock(lock: &dev->port_data[port_num].pkey_list_lock);
288 }
289
290 spin_lock(lock: &pkey->qp_list_lock);
291 list_add(new: &pp->qp_list, head: &pkey->qp_list);
292 spin_unlock(lock: &pkey->qp_list_lock);
293
294 pp->state = IB_PORT_PKEY_LISTED;
295
296 return ret;
297}
298
299/* The caller of this function must hold the QP security
300 * mutex.
301 */
302static void port_pkey_list_remove(struct ib_port_pkey *pp)
303{
304 struct pkey_index_qp_list *pkey;
305
306 if (pp->state != IB_PORT_PKEY_LISTED)
307 return;
308
309 pkey = get_pkey_idx_qp_list(pp);
310
311 spin_lock(lock: &pkey->qp_list_lock);
312 list_del(entry: &pp->qp_list);
313 spin_unlock(lock: &pkey->qp_list_lock);
314
315 /* The setting may still be valid, i.e. after
316 * a destroy has failed for example.
317 */
318 pp->state = IB_PORT_PKEY_VALID;
319}
320
321static void destroy_qp_security(struct ib_qp_security *sec)
322{
323 security_ib_free_security(sec: sec->security);
324 kfree(objp: sec->ports_pkeys);
325 kfree(objp: sec);
326}
327
328/* The caller of this function must hold the QP security
329 * mutex.
330 */
331static struct ib_ports_pkeys *get_new_pps(const struct ib_qp *qp,
332 const struct ib_qp_attr *qp_attr,
333 int qp_attr_mask)
334{
335 struct ib_ports_pkeys *new_pps;
336 struct ib_ports_pkeys *qp_pps = qp->qp_sec->ports_pkeys;
337
338 new_pps = kzalloc(sizeof(*new_pps), GFP_KERNEL);
339 if (!new_pps)
340 return NULL;
341
342 if (qp_attr_mask & IB_QP_PORT)
343 new_pps->main.port_num = qp_attr->port_num;
344 else if (qp_pps)
345 new_pps->main.port_num = qp_pps->main.port_num;
346
347 if (qp_attr_mask & IB_QP_PKEY_INDEX)
348 new_pps->main.pkey_index = qp_attr->pkey_index;
349 else if (qp_pps)
350 new_pps->main.pkey_index = qp_pps->main.pkey_index;
351
352 if (((qp_attr_mask & IB_QP_PKEY_INDEX) &&
353 (qp_attr_mask & IB_QP_PORT)) ||
354 (qp_pps && qp_pps->main.state != IB_PORT_PKEY_NOT_VALID))
355 new_pps->main.state = IB_PORT_PKEY_VALID;
356
357 if (qp_attr_mask & IB_QP_ALT_PATH) {
358 new_pps->alt.port_num = qp_attr->alt_port_num;
359 new_pps->alt.pkey_index = qp_attr->alt_pkey_index;
360 new_pps->alt.state = IB_PORT_PKEY_VALID;
361 } else if (qp_pps) {
362 new_pps->alt.port_num = qp_pps->alt.port_num;
363 new_pps->alt.pkey_index = qp_pps->alt.pkey_index;
364 if (qp_pps->alt.state != IB_PORT_PKEY_NOT_VALID)
365 new_pps->alt.state = IB_PORT_PKEY_VALID;
366 }
367
368 new_pps->main.sec = qp->qp_sec;
369 new_pps->alt.sec = qp->qp_sec;
370 return new_pps;
371}
372
373int ib_open_shared_qp_security(struct ib_qp *qp, struct ib_device *dev)
374{
375 struct ib_qp *real_qp = qp->real_qp;
376 int ret;
377
378 ret = ib_create_qp_security(qp, dev);
379
380 if (ret)
381 return ret;
382
383 if (!qp->qp_sec)
384 return 0;
385
386 mutex_lock(&real_qp->qp_sec->mutex);
387 ret = check_qp_port_pkey_settings(pps: real_qp->qp_sec->ports_pkeys,
388 sec: qp->qp_sec);
389
390 if (ret)
391 goto ret;
392
393 if (qp != real_qp)
394 list_add(new: &qp->qp_sec->shared_qp_list,
395 head: &real_qp->qp_sec->shared_qp_list);
396ret:
397 mutex_unlock(lock: &real_qp->qp_sec->mutex);
398 if (ret)
399 destroy_qp_security(sec: qp->qp_sec);
400
401 return ret;
402}
403
404void ib_close_shared_qp_security(struct ib_qp_security *sec)
405{
406 struct ib_qp *real_qp = sec->qp->real_qp;
407
408 mutex_lock(&real_qp->qp_sec->mutex);
409 list_del(entry: &sec->shared_qp_list);
410 mutex_unlock(lock: &real_qp->qp_sec->mutex);
411
412 destroy_qp_security(sec);
413}
414
415int ib_create_qp_security(struct ib_qp *qp, struct ib_device *dev)
416{
417 unsigned int i;
418 bool is_ib = false;
419 int ret;
420
421 rdma_for_each_port (dev, i) {
422 is_ib = rdma_protocol_ib(device: dev, port_num: i);
423 if (is_ib)
424 break;
425 }
426
427 /* If this isn't an IB device don't create the security context */
428 if (!is_ib)
429 return 0;
430
431 qp->qp_sec = kzalloc(sizeof(*qp->qp_sec), GFP_KERNEL);
432 if (!qp->qp_sec)
433 return -ENOMEM;
434
435 qp->qp_sec->qp = qp;
436 qp->qp_sec->dev = dev;
437 mutex_init(&qp->qp_sec->mutex);
438 INIT_LIST_HEAD(list: &qp->qp_sec->shared_qp_list);
439 atomic_set(v: &qp->qp_sec->error_list_count, i: 0);
440 init_completion(x: &qp->qp_sec->error_complete);
441 ret = security_ib_alloc_security(sec: &qp->qp_sec->security);
442 if (ret) {
443 kfree(objp: qp->qp_sec);
444 qp->qp_sec = NULL;
445 }
446
447 return ret;
448}
449EXPORT_SYMBOL(ib_create_qp_security);
450
451void ib_destroy_qp_security_begin(struct ib_qp_security *sec)
452{
453 /* Return if not IB */
454 if (!sec)
455 return;
456
457 mutex_lock(&sec->mutex);
458
459 /* Remove the QP from the lists so it won't get added to
460 * a to_error_list during the destroy process.
461 */
462 if (sec->ports_pkeys) {
463 port_pkey_list_remove(pp: &sec->ports_pkeys->main);
464 port_pkey_list_remove(pp: &sec->ports_pkeys->alt);
465 }
466
467 /* If the QP is already in one or more of those lists
468 * the destroying flag will ensure the to error flow
469 * doesn't operate on an undefined QP.
470 */
471 sec->destroying = true;
472
473 /* Record the error list count to know how many completions
474 * to wait for.
475 */
476 sec->error_comps_pending = atomic_read(v: &sec->error_list_count);
477
478 mutex_unlock(lock: &sec->mutex);
479}
480
481void ib_destroy_qp_security_abort(struct ib_qp_security *sec)
482{
483 int ret;
484 int i;
485
486 /* Return if not IB */
487 if (!sec)
488 return;
489
490 /* If a concurrent cache update is in progress this
491 * QP security could be marked for an error state
492 * transition. Wait for this to complete.
493 */
494 for (i = 0; i < sec->error_comps_pending; i++)
495 wait_for_completion(&sec->error_complete);
496
497 mutex_lock(&sec->mutex);
498 sec->destroying = false;
499
500 /* Restore the position in the lists and verify
501 * access is still allowed in case a cache update
502 * occurred while attempting to destroy.
503 *
504 * Because these setting were listed already
505 * and removed during ib_destroy_qp_security_begin
506 * we know the pkey_index_qp_list for the PKey
507 * already exists so port_pkey_list_insert won't fail.
508 */
509 if (sec->ports_pkeys) {
510 port_pkey_list_insert(pp: &sec->ports_pkeys->main);
511 port_pkey_list_insert(pp: &sec->ports_pkeys->alt);
512 }
513
514 ret = check_qp_port_pkey_settings(pps: sec->ports_pkeys, sec);
515 if (ret)
516 qp_to_error(sec);
517
518 mutex_unlock(lock: &sec->mutex);
519}
520
521void ib_destroy_qp_security_end(struct ib_qp_security *sec)
522{
523 int i;
524
525 /* Return if not IB */
526 if (!sec)
527 return;
528
529 /* If a concurrent cache update is occurring we must
530 * wait until this QP security structure is processed
531 * in the QP to error flow before destroying it because
532 * the to_error_list is in use.
533 */
534 for (i = 0; i < sec->error_comps_pending; i++)
535 wait_for_completion(&sec->error_complete);
536
537 destroy_qp_security(sec);
538}
539
540void ib_security_cache_change(struct ib_device *device,
541 u32 port_num,
542 u64 subnet_prefix)
543{
544 struct pkey_index_qp_list *pkey;
545
546 list_for_each_entry (pkey, &device->port_data[port_num].pkey_list,
547 pkey_index_list) {
548 check_pkey_qps(pkey,
549 device,
550 port_num,
551 subnet_prefix);
552 }
553}
554
555void ib_security_release_port_pkey_list(struct ib_device *device)
556{
557 struct pkey_index_qp_list *pkey, *tmp_pkey;
558 unsigned int i;
559
560 rdma_for_each_port (device, i) {
561 list_for_each_entry_safe(pkey,
562 tmp_pkey,
563 &device->port_data[i].pkey_list,
564 pkey_index_list) {
565 list_del(entry: &pkey->pkey_index_list);
566 kfree(objp: pkey);
567 }
568 }
569}
570
571int ib_security_modify_qp(struct ib_qp *qp,
572 struct ib_qp_attr *qp_attr,
573 int qp_attr_mask,
574 struct ib_udata *udata)
575{
576 int ret = 0;
577 struct ib_ports_pkeys *tmp_pps;
578 struct ib_ports_pkeys *new_pps = NULL;
579 struct ib_qp *real_qp = qp->real_qp;
580 bool special_qp = (real_qp->qp_type == IB_QPT_SMI ||
581 real_qp->qp_type == IB_QPT_GSI ||
582 real_qp->qp_type >= IB_QPT_RESERVED1);
583 bool pps_change = ((qp_attr_mask & (IB_QP_PKEY_INDEX | IB_QP_PORT)) ||
584 (qp_attr_mask & IB_QP_ALT_PATH));
585
586 WARN_ONCE((qp_attr_mask & IB_QP_PORT &&
587 rdma_protocol_ib(real_qp->device, qp_attr->port_num) &&
588 !real_qp->qp_sec),
589 "%s: QP security is not initialized for IB QP: %u\n",
590 __func__, real_qp->qp_num);
591
592 /* The port/pkey settings are maintained only for the real QP. Open
593 * handles on the real QP will be in the shared_qp_list. When
594 * enforcing security on the real QP all the shared QPs will be
595 * checked as well.
596 */
597
598 if (pps_change && !special_qp && real_qp->qp_sec) {
599 mutex_lock(&real_qp->qp_sec->mutex);
600 new_pps = get_new_pps(qp: real_qp,
601 qp_attr,
602 qp_attr_mask);
603 if (!new_pps) {
604 mutex_unlock(lock: &real_qp->qp_sec->mutex);
605 return -ENOMEM;
606 }
607 /* Add this QP to the lists for the new port
608 * and pkey settings before checking for permission
609 * in case there is a concurrent cache update
610 * occurring. Walking the list for a cache change
611 * doesn't acquire the security mutex unless it's
612 * sending the QP to error.
613 */
614 ret = port_pkey_list_insert(pp: &new_pps->main);
615
616 if (!ret)
617 ret = port_pkey_list_insert(pp: &new_pps->alt);
618
619 if (!ret)
620 ret = check_qp_port_pkey_settings(pps: new_pps,
621 sec: real_qp->qp_sec);
622 }
623
624 if (!ret)
625 ret = real_qp->device->ops.modify_qp(real_qp,
626 qp_attr,
627 qp_attr_mask,
628 udata);
629
630 if (new_pps) {
631 /* Clean up the lists and free the appropriate
632 * ports_pkeys structure.
633 */
634 if (ret) {
635 tmp_pps = new_pps;
636 } else {
637 tmp_pps = real_qp->qp_sec->ports_pkeys;
638 real_qp->qp_sec->ports_pkeys = new_pps;
639 }
640
641 if (tmp_pps) {
642 port_pkey_list_remove(pp: &tmp_pps->main);
643 port_pkey_list_remove(pp: &tmp_pps->alt);
644 }
645 kfree(objp: tmp_pps);
646 mutex_unlock(lock: &real_qp->qp_sec->mutex);
647 }
648 return ret;
649}
650
651static int ib_security_pkey_access(struct ib_device *dev,
652 u32 port_num,
653 u16 pkey_index,
654 void *sec)
655{
656 u64 subnet_prefix;
657 u16 pkey;
658 int ret;
659
660 if (!rdma_protocol_ib(device: dev, port_num))
661 return 0;
662
663 ret = ib_get_cached_pkey(device_handle: dev, port_num, index: pkey_index, pkey: &pkey);
664 if (ret)
665 return ret;
666
667 ib_get_cached_subnet_prefix(device: dev, port_num, sn_pfx: &subnet_prefix);
668
669 return security_ib_pkey_access(sec, subnet_prefix, pkey);
670}
671
672void ib_mad_agent_security_change(void)
673{
674 struct ib_mad_agent *ag;
675
676 spin_lock(lock: &mad_agent_list_lock);
677 list_for_each_entry(ag,
678 &mad_agent_list,
679 mad_agent_sec_list)
680 WRITE_ONCE(ag->smp_allowed,
681 !security_ib_endport_manage_subnet(ag->security,
682 dev_name(&ag->device->dev), ag->port_num));
683 spin_unlock(lock: &mad_agent_list_lock);
684}
685
686int ib_mad_agent_security_setup(struct ib_mad_agent *agent,
687 enum ib_qp_type qp_type)
688{
689 int ret;
690
691 if (!rdma_protocol_ib(device: agent->device, port_num: agent->port_num))
692 return 0;
693
694 INIT_LIST_HEAD(list: &agent->mad_agent_sec_list);
695
696 ret = security_ib_alloc_security(sec: &agent->security);
697 if (ret)
698 return ret;
699
700 if (qp_type != IB_QPT_SMI)
701 return 0;
702
703 spin_lock(lock: &mad_agent_list_lock);
704 ret = security_ib_endport_manage_subnet(sec: agent->security,
705 name: dev_name(dev: &agent->device->dev),
706 port_num: agent->port_num);
707 if (ret)
708 goto free_security;
709
710 WRITE_ONCE(agent->smp_allowed, true);
711 list_add(new: &agent->mad_agent_sec_list, head: &mad_agent_list);
712 spin_unlock(lock: &mad_agent_list_lock);
713 return 0;
714
715free_security:
716 spin_unlock(lock: &mad_agent_list_lock);
717 security_ib_free_security(sec: agent->security);
718 return ret;
719}
720
721void ib_mad_agent_security_cleanup(struct ib_mad_agent *agent)
722{
723 if (!rdma_protocol_ib(device: agent->device, port_num: agent->port_num))
724 return;
725
726 if (agent->qp->qp_type == IB_QPT_SMI) {
727 spin_lock(lock: &mad_agent_list_lock);
728 list_del(entry: &agent->mad_agent_sec_list);
729 spin_unlock(lock: &mad_agent_list_lock);
730 }
731
732 security_ib_free_security(sec: agent->security);
733}
734
735int ib_mad_enforce_security(struct ib_mad_agent_private *map, u16 pkey_index)
736{
737 if (!rdma_protocol_ib(device: map->agent.device, port_num: map->agent.port_num))
738 return 0;
739
740 if (map->agent.qp->qp_type == IB_QPT_SMI) {
741 if (!READ_ONCE(map->agent.smp_allowed))
742 return -EACCES;
743 return 0;
744 }
745
746 return ib_security_pkey_access(dev: map->agent.device,
747 port_num: map->agent.port_num,
748 pkey_index,
749 sec: map->agent.security);
750}
751

source code of linux/drivers/infiniband/core/security.c