drivers/infiniband/core/security.c

   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 #ifdef CONFIG_SECURITY_INFINIBAND
  34
  35 #include <linux/security.h>
  36 #include <linux/completion.h>
  37 #include <linux/list.h>
  38
  39 #include <rdma/ib_verbs.h>
  40 #include <rdma/ib_cache.h>
  41 #include "core_priv.h"
  42 #include "mad_priv.h"
  43
  44 static struct pkey_index_qp_list *get_pkey_idx_qp_list(struct ib_port_pkey *pp)
  45 {
  46         struct pkey_index_qp_list *pkey = NULL;
  47         struct pkey_index_qp_list *tmp_pkey;
  48         struct ib_device *dev = pp->sec->dev;
  49
  50         spin_lock(&dev->port_pkey_list[pp->port_num].list_lock);
  51         list_for_each_entry(tmp_pkey,
  52                             &dev->port_pkey_list[pp->port_num].pkey_list,
  53                             pkey_index_list) {
  54                 if (tmp_pkey->pkey_index == pp->pkey_index) {
  55                         pkey = tmp_pkey;
  56                         break;
  57                 }
  58         }
  59         spin_unlock(&dev->port_pkey_list[pp->port_num].list_lock);
  60         return pkey;
  61 }
  62
  63 static int get_pkey_and_subnet_prefix(struct ib_port_pkey *pp,
  64                                       u16 *pkey,
  65                                       u64 *subnet_prefix)
  66 {
  67         struct ib_device *dev = pp->sec->dev;
  68         int ret;
  69
  70         ret = ib_get_cached_pkey(dev, pp->port_num, pp->pkey_index, pkey);
  71         if (ret)
  72                 return ret;
  73
  74         ret = ib_get_cached_subnet_prefix(dev, pp->port_num, subnet_prefix);
  75
  76         return ret;
  77 }
  78
  79 static int enforce_qp_pkey_security(u16 pkey,
  80                                     u64 subnet_prefix,
  81                                     struct ib_qp_security *qp_sec)
  82 {
  83         struct ib_qp_security *shared_qp_sec;
  84         int ret;
  85
  86         ret = security_ib_pkey_access(qp_sec->security, subnet_prefix, pkey);
  87         if (ret)
  88                 return ret;
  89
  90         list_for_each_entry(shared_qp_sec,
  91                             &qp_sec->shared_qp_list,
  92                             shared_qp_list) {
  93                 ret = security_ib_pkey_access(shared_qp_sec->security,
  94                                               subnet_prefix,
  95                                               pkey);
  96                 if (ret)
  97                         return ret;
  98         }
  99         return 0;
 100 }
 101
 102 /* The caller of this function must hold the QP security
 103  * mutex of the QP of the security structure in *pps.
 104  *
 105  * It takes separate ports_pkeys and security structure
 106  * because in some cases the pps will be for a new settings
 107  * or the pps will be for the real QP and security structure
 108  * will be for a shared QP.
 109  */
 110 static int check_qp_port_pkey_settings(struct ib_ports_pkeys *pps,
 111                                        struct ib_qp_security *sec)
 112 {
 113         u64 subnet_prefix;
 114         u16 pkey;
 115         int ret = 0;
 116
 117         if (!pps)
 118                 return 0;
 119
 120         if (pps->main.state != IB_PORT_PKEY_NOT_VALID) {
 121                 ret = get_pkey_and_subnet_prefix(&pps->main,
 122                                                  &pkey,
 123                                                  &subnet_prefix);
 124                 if (ret)
 125                         return ret;
 126
 127                 ret = enforce_qp_pkey_security(pkey,
 128                                                subnet_prefix,
 129                                                sec);
 130                 if (ret)
 131                         return ret;
 132         }
 133
 134         if (pps->alt.state != IB_PORT_PKEY_NOT_VALID) {
 135                 ret = get_pkey_and_subnet_prefix(&pps->alt,
 136                                                  &pkey,
 137                                                  &subnet_prefix);
 138                 if (ret)
 139                         return ret;
 140
 141                 ret = enforce_qp_pkey_security(pkey,
 142                                                subnet_prefix,
 143                                                sec);
 144         }
 145
 146         return ret;
 147 }
 148
 149 /* The caller of this function must hold the QP security
 150  * mutex.
 151  */
 152 static void qp_to_error(struct ib_qp_security *sec)
 153 {
 154         struct ib_qp_security *shared_qp_sec;
 155         struct ib_qp_attr attr = {
 156                 .qp_state = IB_QPS_ERR
 157         };
 158         struct ib_event event = {
 159                 .event = IB_EVENT_QP_FATAL
 160         };
 161
 162         /* If the QP is in the process of being destroyed
 163          * the qp pointer in the security structure is
 164          * undefined.  It cannot be modified now.
 165          */
 166         if (sec->destroying)
 167                 return;
 168
 169         ib_modify_qp(sec->qp,
 170                      &attr,
 171                      IB_QP_STATE);
 172
 173         if (sec->qp->event_handler && sec->qp->qp_context) {
 174                 event.element.qp = sec->qp;
 175                 sec->qp->event_handler(&event,
 176                                        sec->qp->qp_context);
 177         }
 178
 179         list_for_each_entry(shared_qp_sec,
 180                             &sec->shared_qp_list,
 181                             shared_qp_list) {
 182                 struct ib_qp *qp = shared_qp_sec->qp;
 183
 184                 if (qp->event_handler && qp->qp_context) {
 185                         event.element.qp = qp;
 186                         event.device = qp->device;
 187                         qp->event_handler(&event,
 188                                           qp->qp_context);
 189                 }
 190         }
 191 }
 192
 193 static inline void check_pkey_qps(struct pkey_index_qp_list *pkey,
 194                                   struct ib_device *device,
 195                                   u8 port_num,
 196                                   u64 subnet_prefix)
 197 {
 198         struct ib_port_pkey *pp, *tmp_pp;
 199         bool comp;
 200         LIST_HEAD(to_error_list);
 201         u16 pkey_val;
 202
 203         if (!ib_get_cached_pkey(device,
 204                                 port_num,
 205                                 pkey->pkey_index,
 206                                 &pkey_val)) {
 207                 spin_lock(&pkey->qp_list_lock);
 208                 list_for_each_entry(pp, &pkey->qp_list, qp_list) {
 209                         if (atomic_read(&pp->sec->error_list_count))
 210                                 continue;
 211
 212                         if (enforce_qp_pkey_security(pkey_val,
 213                                                      subnet_prefix,
 214                                                      pp->sec)) {
 215                                 atomic_inc(&pp->sec->error_list_count);
 216                                 list_add(&pp->to_error_list,
 217                                          &to_error_list);
 218                         }
 219                 }
 220                 spin_unlock(&pkey->qp_list_lock);
 221         }
 222
 223         list_for_each_entry_safe(pp,
 224                                  tmp_pp,
 225                                  &to_error_list,
 226                                  to_error_list) {
 227                 mutex_lock(&pp->sec->mutex);
 228                 qp_to_error(pp->sec);
 229                 list_del(&pp->to_error_list);
 230                 atomic_dec(&pp->sec->error_list_count);
 231                 comp = pp->sec->destroying;
 232                 mutex_unlock(&pp->sec->mutex);
 233
 234                 if (comp)
 235                         complete(&pp->sec->error_complete);
 236         }
 237 }
 238
 239 /* The caller of this function must hold the QP security
 240  * mutex.
 241  */
 242 static int port_pkey_list_insert(struct ib_port_pkey *pp)
 243 {
 244         struct pkey_index_qp_list *tmp_pkey;
 245         struct pkey_index_qp_list *pkey;
 246         struct ib_device *dev;
 247         u8 port_num = pp->port_num;
 248         int ret = 0;
 249
 250         if (pp->state != IB_PORT_PKEY_VALID)
 251                 return 0;
 252
 253         dev = pp->sec->dev;
 254
 255         pkey = get_pkey_idx_qp_list(pp);
 256
 257         if (!pkey) {
 258                 bool found = false;
 259
 260                 pkey = kzalloc(sizeof(*pkey), GFP_KERNEL);
 261                 if (!pkey)
 262                         return -ENOMEM;
 263
 264                 spin_lock(&dev->port_pkey_list[port_num].list_lock);
 265                 /* Check for the PKey again.  A racing process may
 266                  * have created it.
 267                  */
 268                 list_for_each_entry(tmp_pkey,
 269                                     &dev->port_pkey_list[port_num].pkey_list,
 270                                     pkey_index_list) {
 271                         if (tmp_pkey->pkey_index == pp->pkey_index) {
 272                                 kfree(pkey);
 273                                 pkey = tmp_pkey;
 274                                 found = true;
 275                                 break;
 276                         }
 277                 }
 278
 279                 if (!found) {
 280                         pkey->pkey_index = pp->pkey_index;
 281                         spin_lock_init(&pkey->qp_list_lock);
 282                         INIT_LIST_HEAD(&pkey->qp_list);
 283                         list_add(&pkey->pkey_index_list,
 284                                  &dev->port_pkey_list[port_num].pkey_list);
 285                 }
 286                 spin_unlock(&dev->port_pkey_list[port_num].list_lock);
 287         }
 288
 289         spin_lock(&pkey->qp_list_lock);
 290         list_add(&pp->qp_list, &pkey->qp_list);
 291         spin_unlock(&pkey->qp_list_lock);
 292
 293         pp->state = IB_PORT_PKEY_LISTED;
 294
 295         return ret;
 296 }
 297
 298 /* The caller of this function must hold the QP security
 299  * mutex.
 300  */
 301 static void port_pkey_list_remove(struct ib_port_pkey *pp)
 302 {
 303         struct pkey_index_qp_list *pkey;
 304
 305         if (pp->state != IB_PORT_PKEY_LISTED)
 306                 return;
 307
 308         pkey = get_pkey_idx_qp_list(pp);
 309
 310         spin_lock(&pkey->qp_list_lock);
 311         list_del(&pp->qp_list);
 312         spin_unlock(&pkey->qp_list_lock);
 313
 314         /* The setting may still be valid, i.e. after
 315          * a destroy has failed for example.
 316          */
 317         pp->state = IB_PORT_PKEY_VALID;
 318 }
 319
 320 static void destroy_qp_security(struct ib_qp_security *sec)
 321 {
 322         security_ib_free_security(sec->security);
 323         kfree(sec->ports_pkeys);
 324         kfree(sec);
 325 }
 326
 327 /* The caller of this function must hold the QP security
 328  * mutex.
 329  */
 330 static struct ib_ports_pkeys *get_new_pps(const struct ib_qp *qp,
 331                                           const struct ib_qp_attr *qp_attr,
 332                                           int qp_attr_mask)
 333 {
 334         struct ib_ports_pkeys *new_pps;
 335         struct ib_ports_pkeys *qp_pps = qp->qp_sec->ports_pkeys;
 336
 337         new_pps = kzalloc(sizeof(*new_pps), GFP_KERNEL);
 338         if (!new_pps)
 339                 return NULL;
 340
 341         if (qp_attr_mask & (IB_QP_PKEY_INDEX | IB_QP_PORT)) {
 342                 if (!qp_pps) {
 343                         new_pps->main.port_num = qp_attr->port_num;
 344                         new_pps->main.pkey_index = qp_attr->pkey_index;
 345                 } else {
 346                         new_pps->main.port_num = (qp_attr_mask & IB_QP_PORT) ?
 347                                                   qp_attr->port_num :
 348                                                   qp_pps->main.port_num;
 349
 350                         new_pps->main.pkey_index =
 351                                         (qp_attr_mask & IB_QP_PKEY_INDEX) ?
 352                                          qp_attr->pkey_index :
 353                                          qp_pps->main.pkey_index;
 354                 }
 355                 new_pps->main.state = IB_PORT_PKEY_VALID;
 356         } else if (qp_pps) {
 357                 new_pps->main.port_num = qp_pps->main.port_num;
 358                 new_pps->main.pkey_index = qp_pps->main.pkey_index;
 359                 if (qp_pps->main.state != IB_PORT_PKEY_NOT_VALID)
 360                         new_pps->main.state = IB_PORT_PKEY_VALID;
 361         }
 362
 363         if (qp_attr_mask & IB_QP_ALT_PATH) {
 364                 new_pps->alt.port_num = qp_attr->alt_port_num;
 365                 new_pps->alt.pkey_index = qp_attr->alt_pkey_index;
 366                 new_pps->alt.state = IB_PORT_PKEY_VALID;
 367         } else if (qp_pps) {
 368                 new_pps->alt.port_num = qp_pps->alt.port_num;
 369                 new_pps->alt.pkey_index = qp_pps->alt.pkey_index;
 370                 if (qp_pps->alt.state != IB_PORT_PKEY_NOT_VALID)
 371                         new_pps->alt.state = IB_PORT_PKEY_VALID;
 372         }
 373
 374         new_pps->main.sec = qp->qp_sec;
 375         new_pps->alt.sec = qp->qp_sec;
 376         return new_pps;
 377 }
 378
 379 int ib_open_shared_qp_security(struct ib_qp *qp, struct ib_device *dev)
 380 {
 381         struct ib_qp *real_qp = qp->real_qp;
 382         int ret;
 383
 384         ret = ib_create_qp_security(qp, dev);
 385
 386         if (ret)
 387                 return ret;
 388
 389         mutex_lock(&real_qp->qp_sec->mutex);
 390         ret = check_qp_port_pkey_settings(real_qp->qp_sec->ports_pkeys,
 391                                           qp->qp_sec);
 392
 393         if (ret)
 394                 goto ret;
 395
 396         if (qp != real_qp)
 397                 list_add(&qp->qp_sec->shared_qp_list,
 398                          &real_qp->qp_sec->shared_qp_list);
 399 ret:
 400         mutex_unlock(&real_qp->qp_sec->mutex);
 401         if (ret)
 402                 destroy_qp_security(qp->qp_sec);
 403
 404         return ret;
 405 }
 406
 407 void ib_close_shared_qp_security(struct ib_qp_security *sec)
 408 {
 409         struct ib_qp *real_qp = sec->qp->real_qp;
 410
 411         mutex_lock(&real_qp->qp_sec->mutex);
 412         list_del(&sec->shared_qp_list);
 413         mutex_unlock(&real_qp->qp_sec->mutex);
 414
 415         destroy_qp_security(sec);
 416 }
 417
 418 int ib_create_qp_security(struct ib_qp *qp, struct ib_device *dev)
 419 {
 420         int ret;
 421
 422         qp->qp_sec = kzalloc(sizeof(*qp->qp_sec), GFP_KERNEL);
 423         if (!qp->qp_sec)
 424                 return -ENOMEM;
 425
 426         qp->qp_sec->qp = qp;
 427         qp->qp_sec->dev = dev;
 428         mutex_init(&qp->qp_sec->mutex);
 429         INIT_LIST_HEAD(&qp->qp_sec->shared_qp_list);
 430         atomic_set(&qp->qp_sec->error_list_count, 0);
 431         init_completion(&qp->qp_sec->error_complete);
 432         ret = security_ib_alloc_security(&qp->qp_sec->security);
 433         if (ret) {
 434                 kfree(qp->qp_sec);
 435                 qp->qp_sec = NULL;
 436         }
 437
 438         return ret;
 439 }
 440 EXPORT_SYMBOL(ib_create_qp_security);
 441
 442 void ib_destroy_qp_security_begin(struct ib_qp_security *sec)
 443 {
 444         mutex_lock(&sec->mutex);
 445
 446         /* Remove the QP from the lists so it won't get added to
 447          * a to_error_list during the destroy process.
 448          */
 449         if (sec->ports_pkeys) {
 450                 port_pkey_list_remove(&sec->ports_pkeys->main);
 451                 port_pkey_list_remove(&sec->ports_pkeys->alt);
 452         }
 453
 454         /* If the QP is already in one or more of those lists
 455          * the destroying flag will ensure the to error flow
 456          * doesn't operate on an undefined QP.
 457          */
 458         sec->destroying = true;
 459
 460         /* Record the error list count to know how many completions
 461          * to wait for.
 462          */
 463         sec->error_comps_pending = atomic_read(&sec->error_list_count);
 464
 465         mutex_unlock(&sec->mutex);
 466 }
 467
 468 void ib_destroy_qp_security_abort(struct ib_qp_security *sec)
 469 {
 470         int ret;
 471         int i;
 472
 473         /* If a concurrent cache update is in progress this
 474          * QP security could be marked for an error state
 475          * transition.  Wait for this to complete.
 476          */
 477         for (i = 0; i < sec->error_comps_pending; i++)
 478                 wait_for_completion(&sec->error_complete);
 479
 480         mutex_lock(&sec->mutex);
 481         sec->destroying = false;
 482
 483         /* Restore the position in the lists and verify
 484          * access is still allowed in case a cache update
 485          * occurred while attempting to destroy.
 486          *
 487          * Because these setting were listed already
 488          * and removed during ib_destroy_qp_security_begin
 489          * we know the pkey_index_qp_list for the PKey
 490          * already exists so port_pkey_list_insert won't fail.
 491          */
 492         if (sec->ports_pkeys) {
 493                 port_pkey_list_insert(&sec->ports_pkeys->main);
 494                 port_pkey_list_insert(&sec->ports_pkeys->alt);
 495         }
 496
 497         ret = check_qp_port_pkey_settings(sec->ports_pkeys, sec);
 498         if (ret)
 499                 qp_to_error(sec);
 500
 501         mutex_unlock(&sec->mutex);
 502 }
 503
 504 void ib_destroy_qp_security_end(struct ib_qp_security *sec)
 505 {
 506         int i;
 507
 508         /* If a concurrent cache update is occurring we must
 509          * wait until this QP security structure is processed
 510          * in the QP to error flow before destroying it because
 511          * the to_error_list is in use.
 512          */
 513         for (i = 0; i < sec->error_comps_pending; i++)
 514                 wait_for_completion(&sec->error_complete);
 515
 516         destroy_qp_security(sec);
 517 }
 518
 519 void ib_security_cache_change(struct ib_device *device,
 520                               u8 port_num,
 521                               u64 subnet_prefix)
 522 {
 523         struct pkey_index_qp_list *pkey;
 524
 525         list_for_each_entry(pkey,
 526                             &device->port_pkey_list[port_num].pkey_list,
 527                             pkey_index_list) {
 528                 check_pkey_qps(pkey,
 529                                device,
 530                                port_num,
 531                                subnet_prefix);
 532         }
 533 }
 534
 535 void ib_security_destroy_port_pkey_list(struct ib_device *device)
 536 {
 537         struct pkey_index_qp_list *pkey, *tmp_pkey;
 538         int i;
 539
 540         for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
 541                 spin_lock(&device->port_pkey_list[i].list_lock);
 542                 list_for_each_entry_safe(pkey,
 543                                          tmp_pkey,
 544                                          &device->port_pkey_list[i].pkey_list,
 545                                          pkey_index_list) {
 546                         list_del(&pkey->pkey_index_list);
 547                         kfree(pkey);
 548                 }
 549                 spin_unlock(&device->port_pkey_list[i].list_lock);
 550         }
 551 }
 552
 553 int ib_security_modify_qp(struct ib_qp *qp,
 554                           struct ib_qp_attr *qp_attr,
 555                           int qp_attr_mask,
 556                           struct ib_udata *udata)
 557 {
 558         int ret = 0;
 559         struct ib_ports_pkeys *tmp_pps;
 560         struct ib_ports_pkeys *new_pps;
 561         struct ib_qp *real_qp = qp->real_qp;
 562         bool special_qp = (real_qp->qp_type == IB_QPT_SMI ||
 563                            real_qp->qp_type == IB_QPT_GSI ||
 564                            real_qp->qp_type >= IB_QPT_RESERVED1);
 565         bool pps_change = ((qp_attr_mask & (IB_QP_PKEY_INDEX | IB_QP_PORT)) ||
 566                            (qp_attr_mask & IB_QP_ALT_PATH));
 567
 568         /* The port/pkey settings are maintained only for the real QP. Open
 569          * handles on the real QP will be in the shared_qp_list. When
 570          * enforcing security on the real QP all the shared QPs will be
 571          * checked as well.
 572          */
 573
 574         if (pps_change && !special_qp) {
 575                 mutex_lock(&real_qp->qp_sec->mutex);
 576                 new_pps = get_new_pps(real_qp,
 577                                       qp_attr,
 578                                       qp_attr_mask);
 579
 580                 /* Add this QP to the lists for the new port
 581                  * and pkey settings before checking for permission
 582                  * in case there is a concurrent cache update
 583                  * occurring.  Walking the list for a cache change
 584                  * doesn't acquire the security mutex unless it's
 585                  * sending the QP to error.
 586                  */
 587                 ret = port_pkey_list_insert(&new_pps->main);
 588
 589                 if (!ret)
 590                         ret = port_pkey_list_insert(&new_pps->alt);
 591
 592                 if (!ret)
 593                         ret = check_qp_port_pkey_settings(new_pps,
 594                                                           real_qp->qp_sec);
 595         }
 596
 597         if (!ret)
 598                 ret = real_qp->device->modify_qp(real_qp,
 599                                                  qp_attr,
 600                                                  qp_attr_mask,
 601                                                  udata);
 602
 603         if (pps_change && !special_qp) {
 604                 /* Clean up the lists and free the appropriate
 605                  * ports_pkeys structure.
 606                  */
 607                 if (ret) {
 608                         tmp_pps = new_pps;
 609                 } else {
 610                         tmp_pps = real_qp->qp_sec->ports_pkeys;
 611                         real_qp->qp_sec->ports_pkeys = new_pps;
 612                 }
 613
 614                 if (tmp_pps) {
 615                         port_pkey_list_remove(&tmp_pps->main);
 616                         port_pkey_list_remove(&tmp_pps->alt);
 617                 }
 618                 kfree(tmp_pps);
 619                 mutex_unlock(&real_qp->qp_sec->mutex);
 620         }
 621         return ret;
 622 }
 623 EXPORT_SYMBOL(ib_security_modify_qp);
 624
 625 int ib_security_pkey_access(struct ib_device *dev,
 626                             u8 port_num,
 627                             u16 pkey_index,
 628                             void *sec)
 629 {
 630         u64 subnet_prefix;
 631         u16 pkey;
 632         int ret;
 633
 634         ret = ib_get_cached_pkey(dev, port_num, pkey_index, &pkey);
 635         if (ret)
 636                 return ret;
 637
 638         ret = ib_get_cached_subnet_prefix(dev, port_num, &subnet_prefix);
 639
 640         if (ret)
 641                 return ret;
 642
 643         return security_ib_pkey_access(sec, subnet_prefix, pkey);
 644 }
 645 EXPORT_SYMBOL(ib_security_pkey_access);
 646
 647 static int ib_mad_agent_security_change(struct notifier_block *nb,
 648                                         unsigned long event,
 649                                         void *data)
 650 {
 651         struct ib_mad_agent *ag = container_of(nb, struct ib_mad_agent, lsm_nb);
 652
 653         if (event != LSM_POLICY_CHANGE)
 654                 return NOTIFY_DONE;
 655
 656         ag->smp_allowed = !security_ib_endport_manage_subnet(ag->security,
 657                                                              ag->device->name,
 658                                                              ag->port_num);
 659
 660         return NOTIFY_OK;
 661 }
 662
 663 int ib_mad_agent_security_setup(struct ib_mad_agent *agent,
 664                                 enum ib_qp_type qp_type)
 665 {
 666         int ret;
 667
 668         ret = security_ib_alloc_security(&agent->security);
 669         if (ret)
 670                 return ret;
 671
 672         if (qp_type != IB_QPT_SMI)
 673                 return 0;
 674
 675         ret = security_ib_endport_manage_subnet(agent->security,
 676                                                 agent->device->name,
 677                                                 agent->port_num);
 678         if (ret)
 679                 return ret;
 680
 681         agent->lsm_nb.notifier_call = ib_mad_agent_security_change;
 682         ret = register_lsm_notifier(&agent->lsm_nb);
 683         if (ret)
 684                 return ret;
 685
 686         agent->smp_allowed = true;
 687         agent->lsm_nb_reg = true;
 688         return 0;
 689 }
 690
 691 void ib_mad_agent_security_cleanup(struct ib_mad_agent *agent)
 692 {
 693         security_ib_free_security(agent->security);
 694         if (agent->lsm_nb_reg)
 695                 unregister_lsm_notifier(&agent->lsm_nb);
 696 }
 697
 698 int ib_mad_enforce_security(struct ib_mad_agent_private *map, u16 pkey_index)
 699 {
 700         if (map->agent.qp->qp_type == IB_QPT_SMI && !map->agent.smp_allowed)
 701                 return -EACCES;
 702
 703         return ib_security_pkey_access(map->agent.device,
 704                                        map->agent.port_num,
 705                                        pkey_index,
 706                                        map->agent.security);
 707 }
 708
 709 #endif /* CONFIG_SECURITY_INFINIBAND */