1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * NetLabel CALIPSO/IPv6 Support 4 * 5 * This file defines the CALIPSO/IPv6 functions for the NetLabel system. The 6 * NetLabel system manages static and dynamic label mappings for network 7 * protocols such as CIPSO and CALIPSO. 8 * 9 * Authors: Paul Moore <paul@paul-moore.com> 10 * Huw Davies <huw@codeweavers.com> 11 */ 12 13 /* (c) Copyright Hewlett-Packard Development Company, L.P., 2006 14 * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015 15 */ 16 17 #include <linux/types.h> 18 #include <linux/socket.h> 19 #include <linux/string.h> 20 #include <linux/skbuff.h> 21 #include <linux/audit.h> 22 #include <linux/slab.h> 23 #include <net/sock.h> 24 #include <net/netlink.h> 25 #include <net/genetlink.h> 26 #include <net/netlabel.h> 27 #include <net/calipso.h> 28 #include <linux/atomic.h> 29 30 #include "netlabel_user.h" 31 #include "netlabel_calipso.h" 32 #include "netlabel_mgmt.h" 33 #include "netlabel_domainhash.h" 34 35 /* Argument struct for calipso_doi_walk() */ 36 struct netlbl_calipso_doiwalk_arg { 37 struct netlink_callback *nl_cb; 38 struct sk_buff *skb; 39 u32 seq; 40 }; 41 42 /* Argument struct for netlbl_domhsh_walk() */ 43 struct netlbl_domhsh_walk_arg { 44 struct netlbl_audit *audit_info; 45 u32 doi; 46 }; 47 48 /* NetLabel Generic NETLINK CALIPSO family */ 49 static struct genl_family netlbl_calipso_gnl_family; 50 51 /* NetLabel Netlink attribute policy */ 52 static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = { 53 [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 }, 54 [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 }, 55 }; 56 57 /* NetLabel Command Handlers 58 */ 59 /** 60 * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition 61 * @info: the Generic NETLINK info block 62 * @audit_info: NetLabel audit information 63 * 64 * Description: 65 * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message 66 * and add it to the CALIPSO engine. Return zero on success and non-zero on 67 * error. 68 * 69 */ 70 static int netlbl_calipso_add_pass(struct genl_info *info, 71 struct netlbl_audit *audit_info) 72 { 73 int ret_val; 74 struct calipso_doi *doi_def = NULL; 75 76 doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); 77 if (!doi_def) 78 return -ENOMEM; 79 doi_def->type = CALIPSO_MAP_PASS; 80 doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); 81 ret_val = calipso_doi_add(doi_def, audit_info); 82 if (ret_val != 0) 83 calipso_doi_free(doi_def); 84 85 return ret_val; 86 } 87 88 /** 89 * netlbl_calipso_add - Handle an ADD message 90 * @skb: the NETLINK buffer 91 * @info: the Generic NETLINK info block 92 * 93 * Description: 94 * Create a new DOI definition based on the given ADD message and add it to the 95 * CALIPSO engine. Returns zero on success, negative values on failure. 96 * 97 */ 98 static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info) 99 100 { 101 int ret_val = -EINVAL; 102 struct netlbl_audit audit_info; 103 104 if (!info->attrs[NLBL_CALIPSO_A_DOI] || 105 !info->attrs[NLBL_CALIPSO_A_MTYPE]) 106 return -EINVAL; 107 108 netlbl_netlink_auditinfo(skb, &audit_info); 109 switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) { 110 case CALIPSO_MAP_PASS: 111 ret_val = netlbl_calipso_add_pass(info, &audit_info); 112 break; 113 } 114 if (ret_val == 0) 115 atomic_inc(&netlabel_mgmt_protocount); 116 117 return ret_val; 118 } 119 120 /** 121 * netlbl_calipso_list - Handle a LIST message 122 * @skb: the NETLINK buffer 123 * @info: the Generic NETLINK info block 124 * 125 * Description: 126 * Process a user generated LIST message and respond accordingly. 127 * Returns zero on success and negative values on error. 128 * 129 */ 130 static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info) 131 { 132 int ret_val; 133 struct sk_buff *ans_skb = NULL; 134 void *data; 135 u32 doi; 136 struct calipso_doi *doi_def; 137 138 if (!info->attrs[NLBL_CALIPSO_A_DOI]) { 139 ret_val = -EINVAL; 140 goto list_failure; 141 } 142 143 doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); 144 145 doi_def = calipso_doi_getdef(doi); 146 if (!doi_def) { 147 ret_val = -EINVAL; 148 goto list_failure; 149 } 150 151 ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 152 if (!ans_skb) { 153 ret_val = -ENOMEM; 154 goto list_failure_put; 155 } 156 data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family, 157 0, NLBL_CALIPSO_C_LIST); 158 if (!data) { 159 ret_val = -ENOMEM; 160 goto list_failure_put; 161 } 162 163 ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type); 164 if (ret_val != 0) 165 goto list_failure_put; 166 167 calipso_doi_putdef(doi_def); 168 169 genlmsg_end(ans_skb, data); 170 return genlmsg_reply(ans_skb, info); 171 172 list_failure_put: 173 calipso_doi_putdef(doi_def); 174 list_failure: 175 kfree_skb(ans_skb); 176 return ret_val; 177 } 178 179 /** 180 * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL 181 * @doi_def: the CALIPSO DOI definition 182 * @arg: the netlbl_calipso_doiwalk_arg structure 183 * 184 * Description: 185 * This function is designed to be used as a callback to the 186 * calipso_doi_walk() function for use in generating a response for a LISTALL 187 * message. Returns the size of the message on success, negative values on 188 * failure. 189 * 190 */ 191 static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg) 192 { 193 int ret_val = -ENOMEM; 194 struct netlbl_calipso_doiwalk_arg *cb_arg = arg; 195 void *data; 196 197 data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, 198 cb_arg->seq, &netlbl_calipso_gnl_family, 199 NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL); 200 if (!data) 201 goto listall_cb_failure; 202 203 ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi); 204 if (ret_val != 0) 205 goto listall_cb_failure; 206 ret_val = nla_put_u32(cb_arg->skb, 207 NLBL_CALIPSO_A_MTYPE, 208 doi_def->type); 209 if (ret_val != 0) 210 goto listall_cb_failure; 211 212 genlmsg_end(cb_arg->skb, data); 213 return 0; 214 215 listall_cb_failure: 216 genlmsg_cancel(cb_arg->skb, data); 217 return ret_val; 218 } 219 220 /** 221 * netlbl_calipso_listall - Handle a LISTALL message 222 * @skb: the NETLINK buffer 223 * @cb: the NETLINK callback 224 * 225 * Description: 226 * Process a user generated LISTALL message and respond accordingly. Returns 227 * zero on success and negative values on error. 228 * 229 */ 230 static int netlbl_calipso_listall(struct sk_buff *skb, 231 struct netlink_callback *cb) 232 { 233 struct netlbl_calipso_doiwalk_arg cb_arg; 234 u32 doi_skip = cb->args[0]; 235 236 cb_arg.nl_cb = cb; 237 cb_arg.skb = skb; 238 cb_arg.seq = cb->nlh->nlmsg_seq; 239 240 calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg); 241 242 cb->args[0] = doi_skip; 243 return skb->len; 244 } 245 246 /** 247 * netlbl_calipso_remove_cb - netlbl_calipso_remove() callback for REMOVE 248 * @entry: LSM domain mapping entry 249 * @arg: the netlbl_domhsh_walk_arg structure 250 * 251 * Description: 252 * This function is intended for use by netlbl_calipso_remove() as the callback 253 * for the netlbl_domhsh_walk() function; it removes LSM domain map entries 254 * which are associated with the CALIPSO DOI specified in @arg. Returns zero on 255 * success, negative values on failure. 256 * 257 */ 258 static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg) 259 { 260 struct netlbl_domhsh_walk_arg *cb_arg = arg; 261 262 if (entry->def.type == NETLBL_NLTYPE_CALIPSO && 263 entry->def.calipso->doi == cb_arg->doi) 264 return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info); 265 266 return 0; 267 } 268 269 /** 270 * netlbl_calipso_remove - Handle a REMOVE message 271 * @skb: the NETLINK buffer 272 * @info: the Generic NETLINK info block 273 * 274 * Description: 275 * Process a user generated REMOVE message and respond accordingly. Returns 276 * zero on success, negative values on failure. 277 * 278 */ 279 static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info) 280 { 281 int ret_val = -EINVAL; 282 struct netlbl_domhsh_walk_arg cb_arg; 283 struct netlbl_audit audit_info; 284 u32 skip_bkt = 0; 285 u32 skip_chain = 0; 286 287 if (!info->attrs[NLBL_CALIPSO_A_DOI]) 288 return -EINVAL; 289 290 netlbl_netlink_auditinfo(skb, &audit_info); 291 cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); 292 cb_arg.audit_info = &audit_info; 293 ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain, 294 netlbl_calipso_remove_cb, &cb_arg); 295 if (ret_val == 0 || ret_val == -ENOENT) { 296 ret_val = calipso_doi_remove(cb_arg.doi, &audit_info); 297 if (ret_val == 0) 298 atomic_dec(&netlabel_mgmt_protocount); 299 } 300 301 return ret_val; 302 } 303 304 /* NetLabel Generic NETLINK Command Definitions 305 */ 306 307 static const struct genl_small_ops netlbl_calipso_ops[] = { 308 { 309 .cmd = NLBL_CALIPSO_C_ADD, 310 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 311 .flags = GENL_ADMIN_PERM, 312 .doit = netlbl_calipso_add, 313 .dumpit = NULL, 314 }, 315 { 316 .cmd = NLBL_CALIPSO_C_REMOVE, 317 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 318 .flags = GENL_ADMIN_PERM, 319 .doit = netlbl_calipso_remove, 320 .dumpit = NULL, 321 }, 322 { 323 .cmd = NLBL_CALIPSO_C_LIST, 324 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 325 .flags = 0, 326 .doit = netlbl_calipso_list, 327 .dumpit = NULL, 328 }, 329 { 330 .cmd = NLBL_CALIPSO_C_LISTALL, 331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 332 .flags = 0, 333 .doit = NULL, 334 .dumpit = netlbl_calipso_listall, 335 }, 336 }; 337 338 static struct genl_family netlbl_calipso_gnl_family __ro_after_init = { 339 .hdrsize = 0, 340 .name = NETLBL_NLTYPE_CALIPSO_NAME, 341 .version = NETLBL_PROTO_VERSION, 342 .maxattr = NLBL_CALIPSO_A_MAX, 343 .policy = calipso_genl_policy, 344 .module = THIS_MODULE, 345 .small_ops = netlbl_calipso_ops, 346 .n_small_ops = ARRAY_SIZE(netlbl_calipso_ops), 347 }; 348 349 /* NetLabel Generic NETLINK Protocol Functions 350 */ 351 352 /** 353 * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component 354 * 355 * Description: 356 * Register the CALIPSO packet NetLabel component with the Generic NETLINK 357 * mechanism. Returns zero on success, negative values on failure. 358 * 359 */ 360 int __init netlbl_calipso_genl_init(void) 361 { 362 return genl_register_family(&netlbl_calipso_gnl_family); 363 } 364 365 static const struct netlbl_calipso_ops *calipso_ops; 366 367 /** 368 * netlbl_calipso_ops_register - Register the CALIPSO operations 369 * @ops: ops to register 370 * 371 * Description: 372 * Register the CALIPSO packet engine operations. 373 * 374 */ 375 const struct netlbl_calipso_ops * 376 netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops) 377 { 378 return xchg(&calipso_ops, ops); 379 } 380 EXPORT_SYMBOL(netlbl_calipso_ops_register); 381 382 static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void) 383 { 384 return READ_ONCE(calipso_ops); 385 } 386 387 /** 388 * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine 389 * @doi_def: the DOI structure 390 * @audit_info: NetLabel audit information 391 * 392 * Description: 393 * The caller defines a new DOI for use by the CALIPSO engine and calls this 394 * function to add it to the list of acceptable domains. The caller must 395 * ensure that the mapping table specified in @doi_def->map meets all of the 396 * requirements of the mapping type (see calipso.h for details). Returns 397 * zero on success and non-zero on failure. 398 * 399 */ 400 int calipso_doi_add(struct calipso_doi *doi_def, 401 struct netlbl_audit *audit_info) 402 { 403 int ret_val = -ENOMSG; 404 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 405 406 if (ops) 407 ret_val = ops->doi_add(doi_def, audit_info); 408 return ret_val; 409 } 410 411 /** 412 * calipso_doi_free - Frees a DOI definition 413 * @doi_def: the DOI definition 414 * 415 * Description: 416 * This function frees all of the memory associated with a DOI definition. 417 * 418 */ 419 void calipso_doi_free(struct calipso_doi *doi_def) 420 { 421 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 422 423 if (ops) 424 ops->doi_free(doi_def); 425 } 426 427 /** 428 * calipso_doi_remove - Remove an existing DOI from the CALIPSO protocol engine 429 * @doi: the DOI value 430 * @audit_info: NetLabel audit information 431 * 432 * Description: 433 * Removes a DOI definition from the CALIPSO engine. The NetLabel routines will 434 * be called to release their own LSM domain mappings as well as our own 435 * domain list. Returns zero on success and negative values on failure. 436 * 437 */ 438 int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info) 439 { 440 int ret_val = -ENOMSG; 441 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 442 443 if (ops) 444 ret_val = ops->doi_remove(doi, audit_info); 445 return ret_val; 446 } 447 448 /** 449 * calipso_doi_getdef - Returns a reference to a valid DOI definition 450 * @doi: the DOI value 451 * 452 * Description: 453 * Searches for a valid DOI definition and if one is found it is returned to 454 * the caller. Otherwise NULL is returned. The caller must ensure that 455 * calipso_doi_putdef() is called when the caller is done. 456 * 457 */ 458 struct calipso_doi *calipso_doi_getdef(u32 doi) 459 { 460 struct calipso_doi *ret_val = NULL; 461 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 462 463 if (ops) 464 ret_val = ops->doi_getdef(doi); 465 return ret_val; 466 } 467 468 /** 469 * calipso_doi_putdef - Releases a reference for the given DOI definition 470 * @doi_def: the DOI definition 471 * 472 * Description: 473 * Releases a DOI definition reference obtained from calipso_doi_getdef(). 474 * 475 */ 476 void calipso_doi_putdef(struct calipso_doi *doi_def) 477 { 478 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 479 480 if (ops) 481 ops->doi_putdef(doi_def); 482 } 483 484 /** 485 * calipso_doi_walk - Iterate through the DOI definitions 486 * @skip_cnt: skip past this number of DOI definitions, updated 487 * @callback: callback for each DOI definition 488 * @cb_arg: argument for the callback function 489 * 490 * Description: 491 * Iterate over the DOI definition list, skipping the first @skip_cnt entries. 492 * For each entry call @callback, if @callback returns a negative value stop 493 * 'walking' through the list and return. Updates the value in @skip_cnt upon 494 * return. Returns zero on success, negative values on failure. 495 * 496 */ 497 int calipso_doi_walk(u32 *skip_cnt, 498 int (*callback)(struct calipso_doi *doi_def, void *arg), 499 void *cb_arg) 500 { 501 int ret_val = -ENOMSG; 502 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 503 504 if (ops) 505 ret_val = ops->doi_walk(skip_cnt, callback, cb_arg); 506 return ret_val; 507 } 508 509 /** 510 * calipso_sock_getattr - Get the security attributes from a sock 511 * @sk: the sock 512 * @secattr: the security attributes 513 * 514 * Description: 515 * Query @sk to see if there is a CALIPSO option attached to the sock and if 516 * there is return the CALIPSO security attributes in @secattr. This function 517 * requires that @sk be locked, or privately held, but it does not do any 518 * locking itself. Returns zero on success and negative values on failure. 519 * 520 */ 521 int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr) 522 { 523 int ret_val = -ENOMSG; 524 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 525 526 if (ops) 527 ret_val = ops->sock_getattr(sk, secattr); 528 return ret_val; 529 } 530 531 /** 532 * calipso_sock_setattr - Add a CALIPSO option to a socket 533 * @sk: the socket 534 * @doi_def: the CALIPSO DOI to use 535 * @secattr: the specific security attributes of the socket 536 * 537 * Description: 538 * Set the CALIPSO option on the given socket using the DOI definition and 539 * security attributes passed to the function. This function requires 540 * exclusive access to @sk, which means it either needs to be in the 541 * process of being created or locked. Returns zero on success and negative 542 * values on failure. 543 * 544 */ 545 int calipso_sock_setattr(struct sock *sk, 546 const struct calipso_doi *doi_def, 547 const struct netlbl_lsm_secattr *secattr) 548 { 549 int ret_val = -ENOMSG; 550 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 551 552 if (ops) 553 ret_val = ops->sock_setattr(sk, doi_def, secattr); 554 return ret_val; 555 } 556 557 /** 558 * calipso_sock_delattr - Delete the CALIPSO option from a socket 559 * @sk: the socket 560 * 561 * Description: 562 * Removes the CALIPSO option from a socket, if present. 563 * 564 */ 565 void calipso_sock_delattr(struct sock *sk) 566 { 567 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 568 569 if (ops) 570 ops->sock_delattr(sk); 571 } 572 573 /** 574 * calipso_req_setattr - Add a CALIPSO option to a connection request socket 575 * @req: the connection request socket 576 * @doi_def: the CALIPSO DOI to use 577 * @secattr: the specific security attributes of the socket 578 * 579 * Description: 580 * Set the CALIPSO option on the given socket using the DOI definition and 581 * security attributes passed to the function. Returns zero on success and 582 * negative values on failure. 583 * 584 */ 585 int calipso_req_setattr(struct request_sock *req, 586 const struct calipso_doi *doi_def, 587 const struct netlbl_lsm_secattr *secattr) 588 { 589 int ret_val = -ENOMSG; 590 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 591 592 if (ops) 593 ret_val = ops->req_setattr(req, doi_def, secattr); 594 return ret_val; 595 } 596 597 /** 598 * calipso_req_delattr - Delete the CALIPSO option from a request socket 599 * @req: the request socket 600 * 601 * Description: 602 * Removes the CALIPSO option from a request socket, if present. 603 * 604 */ 605 void calipso_req_delattr(struct request_sock *req) 606 { 607 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 608 609 if (ops) 610 ops->req_delattr(req); 611 } 612 613 /** 614 * calipso_optptr - Find the CALIPSO option in the packet 615 * @skb: the packet 616 * 617 * Description: 618 * Parse the packet's IP header looking for a CALIPSO option. Returns a pointer 619 * to the start of the CALIPSO option on success, NULL if one if not found. 620 * 621 */ 622 unsigned char *calipso_optptr(const struct sk_buff *skb) 623 { 624 unsigned char *ret_val = NULL; 625 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 626 627 if (ops) 628 ret_val = ops->skbuff_optptr(skb); 629 return ret_val; 630 } 631 632 /** 633 * calipso_getattr - Get the security attributes from a memory block. 634 * @calipso: the CALIPSO option 635 * @secattr: the security attributes 636 * 637 * Description: 638 * Inspect @calipso and return the security attributes in @secattr. 639 * Returns zero on success and negative values on failure. 640 * 641 */ 642 int calipso_getattr(const unsigned char *calipso, 643 struct netlbl_lsm_secattr *secattr) 644 { 645 int ret_val = -ENOMSG; 646 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 647 648 if (ops) 649 ret_val = ops->opt_getattr(calipso, secattr); 650 return ret_val; 651 } 652 653 /** 654 * calipso_skbuff_setattr - Set the CALIPSO option on a packet 655 * @skb: the packet 656 * @doi_def: the CALIPSO DOI to use 657 * @secattr: the security attributes 658 * 659 * Description: 660 * Set the CALIPSO option on the given packet based on the security attributes. 661 * Returns a pointer to the IP header on success and NULL on failure. 662 * 663 */ 664 int calipso_skbuff_setattr(struct sk_buff *skb, 665 const struct calipso_doi *doi_def, 666 const struct netlbl_lsm_secattr *secattr) 667 { 668 int ret_val = -ENOMSG; 669 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 670 671 if (ops) 672 ret_val = ops->skbuff_setattr(skb, doi_def, secattr); 673 return ret_val; 674 } 675 676 /** 677 * calipso_skbuff_delattr - Delete any CALIPSO options from a packet 678 * @skb: the packet 679 * 680 * Description: 681 * Removes any and all CALIPSO options from the given packet. Returns zero on 682 * success, negative values on failure. 683 * 684 */ 685 int calipso_skbuff_delattr(struct sk_buff *skb) 686 { 687 int ret_val = -ENOMSG; 688 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 689 690 if (ops) 691 ret_val = ops->skbuff_delattr(skb); 692 return ret_val; 693 } 694 695 /** 696 * calipso_cache_invalidate - Invalidates the current CALIPSO cache 697 * 698 * Description: 699 * Invalidates and frees any entries in the CALIPSO cache. Returns zero on 700 * success and negative values on failure. 701 * 702 */ 703 void calipso_cache_invalidate(void) 704 { 705 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 706 707 if (ops) 708 ops->cache_invalidate(); 709 } 710 711 /** 712 * calipso_cache_add - Add an entry to the CALIPSO cache 713 * @calipso_ptr: the CALIPSO option 714 * @secattr: the packet's security attributes 715 * 716 * Description: 717 * Add a new entry into the CALIPSO label mapping cache. 718 * Returns zero on success, negative values on failure. 719 * 720 */ 721 int calipso_cache_add(const unsigned char *calipso_ptr, 722 const struct netlbl_lsm_secattr *secattr) 723 724 { 725 int ret_val = -ENOMSG; 726 const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); 727 728 if (ops) 729 ret_val = ops->cache_add(calipso_ptr, secattr); 730 return ret_val; 731 } 732