1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * NetLabel System 4 * 5 * The NetLabel system manages static and dynamic label mappings for network 6 * protocols such as CIPSO and RIPSO. 7 * 8 * Author: Paul Moore <paul@paul-moore.com> 9 */ 10 11 /* 12 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 13 */ 14 15 #ifndef _NETLABEL_H 16 #define _NETLABEL_H 17 18 #include <linux/types.h> 19 #include <linux/slab.h> 20 #include <linux/net.h> 21 #include <linux/skbuff.h> 22 #include <linux/in.h> 23 #include <linux/in6.h> 24 #include <net/netlink.h> 25 #include <net/request_sock.h> 26 #include <linux/refcount.h> 27 28 struct cipso_v4_doi; 29 struct calipso_doi; 30 31 /* 32 * NetLabel - A management interface for maintaining network packet label 33 * mapping tables for explicit packet labling protocols. 34 * 35 * Network protocols such as CIPSO and RIPSO require a label translation layer 36 * to convert the label on the packet into something meaningful on the host 37 * machine. In the current Linux implementation these mapping tables live 38 * inside the kernel; NetLabel provides a mechanism for user space applications 39 * to manage these mapping tables. 40 * 41 * NetLabel makes use of the Generic NETLINK mechanism as a transport layer to 42 * send messages between kernel and user space. The general format of a 43 * NetLabel message is shown below: 44 * 45 * +-----------------+-------------------+--------- --- -- - 46 * | struct nlmsghdr | struct genlmsghdr | payload 47 * +-----------------+-------------------+--------- --- -- - 48 * 49 * The 'nlmsghdr' and 'genlmsghdr' structs should be dealt with like normal. 50 * The payload is dependent on the subsystem specified in the 51 * 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions 52 * should be defined in the corresponding net/netlabel/netlabel_<subsys>.h|c 53 * file. All of the fields in the NetLabel payload are NETLINK attributes, see 54 * the include/net/netlink.h file for more information on NETLINK attributes. 55 * 56 */ 57 58 /* 59 * NetLabel NETLINK protocol 60 */ 61 62 /* NetLabel NETLINK protocol version 63 * 1: initial version 64 * 2: added static labels for unlabeled connections 65 * 3: network selectors added to the NetLabel/LSM domain mapping and the 66 * CIPSO_V4_MAP_LOCAL CIPSO mapping was added 67 */ 68 #define NETLBL_PROTO_VERSION 3 69 70 /* NetLabel NETLINK types/families */ 71 #define NETLBL_NLTYPE_NONE 0 72 #define NETLBL_NLTYPE_MGMT 1 73 #define NETLBL_NLTYPE_MGMT_NAME "NLBL_MGMT" 74 #define NETLBL_NLTYPE_RIPSO 2 75 #define NETLBL_NLTYPE_RIPSO_NAME "NLBL_RIPSO" 76 #define NETLBL_NLTYPE_CIPSOV4 3 77 #define NETLBL_NLTYPE_CIPSOV4_NAME "NLBL_CIPSOv4" 78 #define NETLBL_NLTYPE_CIPSOV6 4 79 #define NETLBL_NLTYPE_CIPSOV6_NAME "NLBL_CIPSOv6" 80 #define NETLBL_NLTYPE_UNLABELED 5 81 #define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL" 82 #define NETLBL_NLTYPE_ADDRSELECT 6 83 #define NETLBL_NLTYPE_ADDRSELECT_NAME "NLBL_ADRSEL" 84 #define NETLBL_NLTYPE_CALIPSO 7 85 #define NETLBL_NLTYPE_CALIPSO_NAME "NLBL_CALIPSO" 86 87 /* 88 * NetLabel - Kernel API for accessing the network packet label mappings. 89 * 90 * The following functions are provided for use by other kernel modules, 91 * specifically kernel LSM modules, to provide a consistent, transparent API 92 * for dealing with explicit packet labeling protocols such as CIPSO and 93 * RIPSO. The functions defined here are implemented in the 94 * net/netlabel/netlabel_kapi.c file. 95 * 96 */ 97 98 /* NetLabel audit information */ 99 struct netlbl_audit { 100 u32 secid; 101 kuid_t loginuid; 102 unsigned int sessionid; 103 }; 104 105 /* 106 * LSM security attributes 107 */ 108 109 /** 110 * struct netlbl_lsm_cache - NetLabel LSM security attribute cache 111 * @refcount: atomic reference counter 112 * @free: LSM supplied function to free the cache data 113 * @data: LSM supplied cache data 114 * 115 * Description: 116 * This structure is provided for LSMs which wish to make use of the NetLabel 117 * caching mechanism to store LSM specific data/attributes in the NetLabel 118 * cache. If the LSM has to perform a lot of translation from the NetLabel 119 * security attributes into it's own internal representation then the cache 120 * mechanism can provide a way to eliminate some or all of that translation 121 * overhead on a cache hit. 122 * 123 */ 124 struct netlbl_lsm_cache { 125 refcount_t refcount; 126 void (*free) (const void *data); 127 void *data; 128 }; 129 130 /** 131 * struct netlbl_lsm_catmap - NetLabel LSM secattr category bitmap 132 * @startbit: the value of the lowest order bit in the bitmap 133 * @bitmap: the category bitmap 134 * @next: pointer to the next bitmap "node" or NULL 135 * 136 * Description: 137 * This structure is used to represent category bitmaps. Due to the large 138 * number of categories supported by most labeling protocols it is not 139 * practical to transfer a full bitmap internally so NetLabel adopts a sparse 140 * bitmap structure modeled after SELinux's ebitmap structure. 141 * The catmap bitmap field MUST be a power of two in length and large 142 * enough to hold at least 240 bits. Special care (i.e. check the code!) 143 * should be used when changing these values as the LSM implementation 144 * probably has functions which rely on the sizes of these types to speed 145 * processing. 146 * 147 */ 148 #define NETLBL_CATMAP_MAPTYPE u64 149 #define NETLBL_CATMAP_MAPCNT 4 150 #define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8) 151 #define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \ 152 NETLBL_CATMAP_MAPCNT) 153 #define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01 154 struct netlbl_lsm_catmap { 155 u32 startbit; 156 NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT]; 157 struct netlbl_lsm_catmap *next; 158 }; 159 160 /** 161 * struct netlbl_lsm_secattr - NetLabel LSM security attributes 162 * @flags: indicate structure attributes, see NETLBL_SECATTR_* 163 * @type: indicate the NLTYPE of the attributes 164 * @domain: the NetLabel LSM domain 165 * @cache: NetLabel LSM specific cache 166 * @attr.mls: MLS sensitivity label 167 * @attr.mls.cat: MLS category bitmap 168 * @attr.mls.lvl: MLS sensitivity level 169 * @attr.secid: LSM specific secid token 170 * 171 * Description: 172 * This structure is used to pass security attributes between NetLabel and the 173 * LSM modules. The flags field is used to specify which fields within the 174 * struct are valid and valid values can be created by bitwise OR'ing the 175 * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to 176 * specify domain specific configuration settings and is not usually used by 177 * NetLabel itself when returning security attributes to the LSM. 178 * 179 */ 180 struct netlbl_lsm_secattr { 181 u32 flags; 182 /* bitmap values for 'flags' */ 183 #define NETLBL_SECATTR_NONE 0x00000000 184 #define NETLBL_SECATTR_DOMAIN 0x00000001 185 #define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \ 186 NETLBL_SECATTR_FREE_DOMAIN) 187 #define NETLBL_SECATTR_CACHE 0x00000002 188 #define NETLBL_SECATTR_MLS_LVL 0x00000004 189 #define NETLBL_SECATTR_MLS_CAT 0x00000008 190 #define NETLBL_SECATTR_SECID 0x00000010 191 /* bitmap meta-values for 'flags' */ 192 #define NETLBL_SECATTR_FREE_DOMAIN 0x01000000 193 #define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \ 194 NETLBL_SECATTR_MLS_CAT | \ 195 NETLBL_SECATTR_SECID) 196 u32 type; 197 char *domain; 198 struct netlbl_lsm_cache *cache; 199 struct { 200 struct { 201 struct netlbl_lsm_catmap *cat; 202 u32 lvl; 203 } mls; 204 u32 secid; 205 } attr; 206 }; 207 208 /** 209 * struct netlbl_calipso_ops - NetLabel CALIPSO operations 210 * @doi_add: add a CALIPSO DOI 211 * @doi_free: free a CALIPSO DOI 212 * @doi_getdef: returns a reference to a DOI 213 * @doi_putdef: releases a reference of a DOI 214 * @doi_walk: enumerate the DOI list 215 * @sock_getattr: retrieve the socket's attr 216 * @sock_setattr: set the socket's attr 217 * @sock_delattr: remove the socket's attr 218 * @req_setattr: set the req socket's attr 219 * @req_delattr: remove the req socket's attr 220 * @opt_getattr: retrieve attr from memory block 221 * @skbuff_optptr: find option in packet 222 * @skbuff_setattr: set the skbuff's attr 223 * @skbuff_delattr: remove the skbuff's attr 224 * @cache_invalidate: invalidate cache 225 * @cache_add: add cache entry 226 * 227 * Description: 228 * This structure is filled out by the CALIPSO engine and passed 229 * to the NetLabel core via a call to netlbl_calipso_ops_register(). 230 * It enables the CALIPSO engine (and hence IPv6) to be compiled 231 * as a module. 232 */ 233 struct netlbl_calipso_ops { 234 int (*doi_add)(struct calipso_doi *doi_def, 235 struct netlbl_audit *audit_info); 236 void (*doi_free)(struct calipso_doi *doi_def); 237 int (*doi_remove)(u32 doi, struct netlbl_audit *audit_info); 238 struct calipso_doi *(*doi_getdef)(u32 doi); 239 void (*doi_putdef)(struct calipso_doi *doi_def); 240 int (*doi_walk)(u32 *skip_cnt, 241 int (*callback)(struct calipso_doi *doi_def, void *arg), 242 void *cb_arg); 243 int (*sock_getattr)(struct sock *sk, 244 struct netlbl_lsm_secattr *secattr); 245 int (*sock_setattr)(struct sock *sk, 246 const struct calipso_doi *doi_def, 247 const struct netlbl_lsm_secattr *secattr); 248 void (*sock_delattr)(struct sock *sk); 249 int (*req_setattr)(struct request_sock *req, 250 const struct calipso_doi *doi_def, 251 const struct netlbl_lsm_secattr *secattr); 252 void (*req_delattr)(struct request_sock *req); 253 int (*opt_getattr)(const unsigned char *calipso, 254 struct netlbl_lsm_secattr *secattr); 255 unsigned char *(*skbuff_optptr)(const struct sk_buff *skb); 256 int (*skbuff_setattr)(struct sk_buff *skb, 257 const struct calipso_doi *doi_def, 258 const struct netlbl_lsm_secattr *secattr); 259 int (*skbuff_delattr)(struct sk_buff *skb); 260 void (*cache_invalidate)(void); 261 int (*cache_add)(const unsigned char *calipso_ptr, 262 const struct netlbl_lsm_secattr *secattr); 263 }; 264 265 /* 266 * LSM security attribute operations (inline) 267 */ 268 269 /** 270 * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache 271 * @flags: the memory allocation flags 272 * 273 * Description: 274 * Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer 275 * on success, NULL on failure. 276 * 277 */ 278 static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags) 279 { 280 struct netlbl_lsm_cache *cache; 281 282 cache = kzalloc(sizeof(*cache), flags); 283 if (cache) 284 refcount_set(&cache->refcount, 1); 285 return cache; 286 } 287 288 /** 289 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct 290 * @cache: the struct to free 291 * 292 * Description: 293 * Frees @secattr including all of the internal buffers. 294 * 295 */ 296 static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache) 297 { 298 if (!refcount_dec_and_test(&cache->refcount)) 299 return; 300 301 if (cache->free) 302 cache->free(cache->data); 303 kfree(cache); 304 } 305 306 /** 307 * netlbl_catmap_alloc - Allocate a LSM secattr catmap 308 * @flags: memory allocation flags 309 * 310 * Description: 311 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL 312 * on failure. 313 * 314 */ 315 static inline struct netlbl_lsm_catmap *netlbl_catmap_alloc(gfp_t flags) 316 { 317 return kzalloc(sizeof(struct netlbl_lsm_catmap), flags); 318 } 319 320 /** 321 * netlbl_catmap_free - Free a LSM secattr catmap 322 * @catmap: the category bitmap 323 * 324 * Description: 325 * Free a LSM secattr catmap. 326 * 327 */ 328 static inline void netlbl_catmap_free(struct netlbl_lsm_catmap *catmap) 329 { 330 struct netlbl_lsm_catmap *iter; 331 332 while (catmap) { 333 iter = catmap; 334 catmap = catmap->next; 335 kfree(iter); 336 } 337 } 338 339 /** 340 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct 341 * @secattr: the struct to initialize 342 * 343 * Description: 344 * Initialize an already allocated netlbl_lsm_secattr struct. 345 * 346 */ 347 static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) 348 { 349 memset(secattr, 0, sizeof(*secattr)); 350 } 351 352 /** 353 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct 354 * @secattr: the struct to clear 355 * 356 * Description: 357 * Destroys the @secattr struct, including freeing all of the internal buffers. 358 * The struct must be reset with a call to netlbl_secattr_init() before reuse. 359 * 360 */ 361 static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr) 362 { 363 if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN) 364 kfree(secattr->domain); 365 if (secattr->flags & NETLBL_SECATTR_CACHE) 366 netlbl_secattr_cache_free(secattr->cache); 367 if (secattr->flags & NETLBL_SECATTR_MLS_CAT) 368 netlbl_catmap_free(secattr->attr.mls.cat); 369 } 370 371 /** 372 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct 373 * @flags: the memory allocation flags 374 * 375 * Description: 376 * Allocate and initialize a netlbl_lsm_secattr struct. Returns a valid 377 * pointer on success, or NULL on failure. 378 * 379 */ 380 static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags) 381 { 382 return kzalloc(sizeof(struct netlbl_lsm_secattr), flags); 383 } 384 385 /** 386 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct 387 * @secattr: the struct to free 388 * 389 * Description: 390 * Frees @secattr including all of the internal buffers. 391 * 392 */ 393 static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr) 394 { 395 netlbl_secattr_destroy(secattr); 396 kfree(secattr); 397 } 398 399 #ifdef CONFIG_NETLABEL 400 /* 401 * LSM configuration operations 402 */ 403 int netlbl_cfg_map_del(const char *domain, 404 u16 family, 405 const void *addr, 406 const void *mask, 407 struct netlbl_audit *audit_info); 408 int netlbl_cfg_unlbl_map_add(const char *domain, 409 u16 family, 410 const void *addr, 411 const void *mask, 412 struct netlbl_audit *audit_info); 413 int netlbl_cfg_unlbl_static_add(struct net *net, 414 const char *dev_name, 415 const void *addr, 416 const void *mask, 417 u16 family, 418 u32 secid, 419 struct netlbl_audit *audit_info); 420 int netlbl_cfg_unlbl_static_del(struct net *net, 421 const char *dev_name, 422 const void *addr, 423 const void *mask, 424 u16 family, 425 struct netlbl_audit *audit_info); 426 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, 427 struct netlbl_audit *audit_info); 428 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info); 429 int netlbl_cfg_cipsov4_map_add(u32 doi, 430 const char *domain, 431 const struct in_addr *addr, 432 const struct in_addr *mask, 433 struct netlbl_audit *audit_info); 434 int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, 435 struct netlbl_audit *audit_info); 436 void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info); 437 int netlbl_cfg_calipso_map_add(u32 doi, 438 const char *domain, 439 const struct in6_addr *addr, 440 const struct in6_addr *mask, 441 struct netlbl_audit *audit_info); 442 /* 443 * LSM security attribute operations 444 */ 445 int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset); 446 int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset); 447 int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, 448 u32 *offset, 449 unsigned long *bitmap); 450 int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, 451 u32 bit, 452 gfp_t flags); 453 int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, 454 u32 start, 455 u32 end, 456 gfp_t flags); 457 int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, 458 u32 offset, 459 unsigned long bitmap, 460 gfp_t flags); 461 462 /* Bitmap functions 463 */ 464 int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len, 465 u32 offset, u8 state); 466 void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state); 467 468 /* 469 * LSM protocol operations (NetLabel LSM/kernel API) 470 */ 471 int netlbl_enabled(void); 472 int netlbl_sock_setattr(struct sock *sk, 473 u16 family, 474 const struct netlbl_lsm_secattr *secattr); 475 void netlbl_sock_delattr(struct sock *sk); 476 int netlbl_sock_getattr(struct sock *sk, 477 struct netlbl_lsm_secattr *secattr); 478 int netlbl_conn_setattr(struct sock *sk, 479 struct sockaddr *addr, 480 const struct netlbl_lsm_secattr *secattr); 481 int netlbl_req_setattr(struct request_sock *req, 482 const struct netlbl_lsm_secattr *secattr); 483 void netlbl_req_delattr(struct request_sock *req); 484 int netlbl_skbuff_setattr(struct sk_buff *skb, 485 u16 family, 486 const struct netlbl_lsm_secattr *secattr); 487 int netlbl_skbuff_getattr(const struct sk_buff *skb, 488 u16 family, 489 struct netlbl_lsm_secattr *secattr); 490 void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway); 491 492 /* 493 * LSM label mapping cache operations 494 */ 495 void netlbl_cache_invalidate(void); 496 int netlbl_cache_add(const struct sk_buff *skb, u16 family, 497 const struct netlbl_lsm_secattr *secattr); 498 499 /* 500 * Protocol engine operations 501 */ 502 struct audit_buffer *netlbl_audit_start(int type, 503 struct netlbl_audit *audit_info); 504 #else 505 static inline int netlbl_cfg_map_del(const char *domain, 506 u16 family, 507 const void *addr, 508 const void *mask, 509 struct netlbl_audit *audit_info) 510 { 511 return -ENOSYS; 512 } 513 static inline int netlbl_cfg_unlbl_map_add(const char *domain, 514 u16 family, 515 void *addr, 516 void *mask, 517 struct netlbl_audit *audit_info) 518 { 519 return -ENOSYS; 520 } 521 static inline int netlbl_cfg_unlbl_static_add(struct net *net, 522 const char *dev_name, 523 const void *addr, 524 const void *mask, 525 u16 family, 526 u32 secid, 527 struct netlbl_audit *audit_info) 528 { 529 return -ENOSYS; 530 } 531 static inline int netlbl_cfg_unlbl_static_del(struct net *net, 532 const char *dev_name, 533 const void *addr, 534 const void *mask, 535 u16 family, 536 struct netlbl_audit *audit_info) 537 { 538 return -ENOSYS; 539 } 540 static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, 541 struct netlbl_audit *audit_info) 542 { 543 return -ENOSYS; 544 } 545 static inline void netlbl_cfg_cipsov4_del(u32 doi, 546 struct netlbl_audit *audit_info) 547 { 548 return; 549 } 550 static inline int netlbl_cfg_cipsov4_map_add(u32 doi, 551 const char *domain, 552 const struct in_addr *addr, 553 const struct in_addr *mask, 554 struct netlbl_audit *audit_info) 555 { 556 return -ENOSYS; 557 } 558 static inline int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, 559 struct netlbl_audit *audit_info) 560 { 561 return -ENOSYS; 562 } 563 static inline void netlbl_cfg_calipso_del(u32 doi, 564 struct netlbl_audit *audit_info) 565 { 566 return; 567 } 568 static inline int netlbl_cfg_calipso_map_add(u32 doi, 569 const char *domain, 570 const struct in6_addr *addr, 571 const struct in6_addr *mask, 572 struct netlbl_audit *audit_info) 573 { 574 return -ENOSYS; 575 } 576 static inline int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, 577 u32 offset) 578 { 579 return -ENOENT; 580 } 581 static inline int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, 582 u32 offset) 583 { 584 return -ENOENT; 585 } 586 static inline int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, 587 u32 *offset, 588 unsigned long *bitmap) 589 { 590 return 0; 591 } 592 static inline int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, 593 u32 bit, 594 gfp_t flags) 595 { 596 return 0; 597 } 598 static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, 599 u32 start, 600 u32 end, 601 gfp_t flags) 602 { 603 return 0; 604 } 605 static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, 606 u32 offset, 607 unsigned long bitmap, 608 gfp_t flags) 609 { 610 return 0; 611 } 612 static inline int netlbl_enabled(void) 613 { 614 return 0; 615 } 616 static inline int netlbl_sock_setattr(struct sock *sk, 617 u16 family, 618 const struct netlbl_lsm_secattr *secattr) 619 { 620 return -ENOSYS; 621 } 622 static inline void netlbl_sock_delattr(struct sock *sk) 623 { 624 } 625 static inline int netlbl_sock_getattr(struct sock *sk, 626 struct netlbl_lsm_secattr *secattr) 627 { 628 return -ENOSYS; 629 } 630 static inline int netlbl_conn_setattr(struct sock *sk, 631 struct sockaddr *addr, 632 const struct netlbl_lsm_secattr *secattr) 633 { 634 return -ENOSYS; 635 } 636 static inline int netlbl_req_setattr(struct request_sock *req, 637 const struct netlbl_lsm_secattr *secattr) 638 { 639 return -ENOSYS; 640 } 641 static inline void netlbl_req_delattr(struct request_sock *req) 642 { 643 return; 644 } 645 static inline int netlbl_skbuff_setattr(struct sk_buff *skb, 646 u16 family, 647 const struct netlbl_lsm_secattr *secattr) 648 { 649 return -ENOSYS; 650 } 651 static inline int netlbl_skbuff_getattr(const struct sk_buff *skb, 652 u16 family, 653 struct netlbl_lsm_secattr *secattr) 654 { 655 return -ENOSYS; 656 } 657 static inline void netlbl_skbuff_err(struct sk_buff *skb, 658 int error, 659 int gateway) 660 { 661 return; 662 } 663 static inline void netlbl_cache_invalidate(void) 664 { 665 return; 666 } 667 static inline int netlbl_cache_add(const struct sk_buff *skb, u16 family, 668 const struct netlbl_lsm_secattr *secattr) 669 { 670 return 0; 671 } 672 static inline struct audit_buffer *netlbl_audit_start(int type, 673 struct netlbl_audit *audit_info) 674 { 675 return NULL; 676 } 677 #endif /* CONFIG_NETLABEL */ 678 679 const struct netlbl_calipso_ops * 680 netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops); 681 682 #endif /* _NETLABEL_H */ 683