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_MAPCNT 4 149 #define NETLBL_CATMAP_MAPSIZE (sizeof(u64) * 8) 150 #define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \ 151 NETLBL_CATMAP_MAPCNT) 152 #define NETLBL_CATMAP_BIT ((u64)0x01) 153 struct netlbl_lsm_catmap { 154 u32 startbit; 155 u64 bitmap[NETLBL_CATMAP_MAPCNT]; 156 struct netlbl_lsm_catmap *next; 157 }; 158 159 /** 160 * struct netlbl_lsm_secattr - NetLabel LSM security attributes 161 * @flags: indicate structure attributes, see NETLBL_SECATTR_* 162 * @type: indicate the NLTYPE of the attributes 163 * @domain: the NetLabel LSM domain 164 * @cache: NetLabel LSM specific cache 165 * @attr.mls: MLS sensitivity label 166 * @attr.mls.cat: MLS category bitmap 167 * @attr.mls.lvl: MLS sensitivity level 168 * @attr.secid: LSM specific secid token 169 * 170 * Description: 171 * This structure is used to pass security attributes between NetLabel and the 172 * LSM modules. The flags field is used to specify which fields within the 173 * struct are valid and valid values can be created by bitwise OR'ing the 174 * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to 175 * specify domain specific configuration settings and is not usually used by 176 * NetLabel itself when returning security attributes to the LSM. 177 * 178 */ 179 struct netlbl_lsm_secattr { 180 u32 flags; 181 /* bitmap values for 'flags' */ 182 #define NETLBL_SECATTR_NONE 0x00000000 183 #define NETLBL_SECATTR_DOMAIN 0x00000001 184 #define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \ 185 NETLBL_SECATTR_FREE_DOMAIN) 186 #define NETLBL_SECATTR_CACHE 0x00000002 187 #define NETLBL_SECATTR_MLS_LVL 0x00000004 188 #define NETLBL_SECATTR_MLS_CAT 0x00000008 189 #define NETLBL_SECATTR_SECID 0x00000010 190 /* bitmap meta-values for 'flags' */ 191 #define NETLBL_SECATTR_FREE_DOMAIN 0x01000000 192 #define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \ 193 NETLBL_SECATTR_MLS_CAT | \ 194 NETLBL_SECATTR_SECID) 195 u32 type; 196 char *domain; 197 struct netlbl_lsm_cache *cache; 198 struct { 199 struct { 200 struct netlbl_lsm_catmap *cat; 201 u32 lvl; 202 } mls; 203 u32 secid; 204 } attr; 205 }; 206 207 /** 208 * struct netlbl_calipso_ops - NetLabel CALIPSO operations 209 * @doi_add: add a CALIPSO DOI 210 * @doi_free: free a CALIPSO DOI 211 * @doi_getdef: returns a reference to a DOI 212 * @doi_putdef: releases a reference of a DOI 213 * @doi_walk: enumerate the DOI list 214 * @sock_getattr: retrieve the socket's attr 215 * @sock_setattr: set the socket's attr 216 * @sock_delattr: remove the socket's attr 217 * @req_setattr: set the req socket's attr 218 * @req_delattr: remove the req socket's attr 219 * @opt_getattr: retrieve attr from memory block 220 * @skbuff_optptr: find option in packet 221 * @skbuff_setattr: set the skbuff's attr 222 * @skbuff_delattr: remove the skbuff's attr 223 * @cache_invalidate: invalidate cache 224 * @cache_add: add cache entry 225 * 226 * Description: 227 * This structure is filled out by the CALIPSO engine and passed 228 * to the NetLabel core via a call to netlbl_calipso_ops_register(). 229 * It enables the CALIPSO engine (and hence IPv6) to be compiled 230 * as a module. 231 */ 232 struct netlbl_calipso_ops { 233 int (*doi_add)(struct calipso_doi *doi_def, 234 struct netlbl_audit *audit_info); 235 void (*doi_free)(struct calipso_doi *doi_def); 236 int (*doi_remove)(u32 doi, struct netlbl_audit *audit_info); 237 struct calipso_doi *(*doi_getdef)(u32 doi); 238 void (*doi_putdef)(struct calipso_doi *doi_def); 239 int (*doi_walk)(u32 *skip_cnt, 240 int (*callback)(struct calipso_doi *doi_def, void *arg), 241 void *cb_arg); 242 int (*sock_getattr)(struct sock *sk, 243 struct netlbl_lsm_secattr *secattr); 244 int (*sock_setattr)(struct sock *sk, 245 const struct calipso_doi *doi_def, 246 const struct netlbl_lsm_secattr *secattr); 247 void (*sock_delattr)(struct sock *sk); 248 int (*req_setattr)(struct request_sock *req, 249 const struct calipso_doi *doi_def, 250 const struct netlbl_lsm_secattr *secattr); 251 void (*req_delattr)(struct request_sock *req); 252 int (*opt_getattr)(const unsigned char *calipso, 253 struct netlbl_lsm_secattr *secattr); 254 unsigned char *(*skbuff_optptr)(const struct sk_buff *skb); 255 int (*skbuff_setattr)(struct sk_buff *skb, 256 const struct calipso_doi *doi_def, 257 const struct netlbl_lsm_secattr *secattr); 258 int (*skbuff_delattr)(struct sk_buff *skb); 259 void (*cache_invalidate)(void); 260 int (*cache_add)(const unsigned char *calipso_ptr, 261 const struct netlbl_lsm_secattr *secattr); 262 }; 263 264 /* 265 * LSM security attribute operations (inline) 266 */ 267 268 /** 269 * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache 270 * @flags: the memory allocation flags 271 * 272 * Description: 273 * Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer 274 * on success, NULL on failure. 275 * 276 */ 277 static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags) 278 { 279 struct netlbl_lsm_cache *cache; 280 281 cache = kzalloc(sizeof(*cache), flags); 282 if (cache) 283 refcount_set(&cache->refcount, 1); 284 return cache; 285 } 286 287 /** 288 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct 289 * @cache: the struct to free 290 * 291 * Description: 292 * Frees @secattr including all of the internal buffers. 293 * 294 */ 295 static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache) 296 { 297 if (!refcount_dec_and_test(&cache->refcount)) 298 return; 299 300 if (cache->free) 301 cache->free(cache->data); 302 kfree(cache); 303 } 304 305 /** 306 * netlbl_catmap_alloc - Allocate a LSM secattr catmap 307 * @flags: memory allocation flags 308 * 309 * Description: 310 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL 311 * on failure. 312 * 313 */ 314 static inline struct netlbl_lsm_catmap *netlbl_catmap_alloc(gfp_t flags) 315 { 316 return kzalloc(sizeof(struct netlbl_lsm_catmap), flags); 317 } 318 319 /** 320 * netlbl_catmap_free - Free a LSM secattr catmap 321 * @catmap: the category bitmap 322 * 323 * Description: 324 * Free a LSM secattr catmap. 325 * 326 */ 327 static inline void netlbl_catmap_free(struct netlbl_lsm_catmap *catmap) 328 { 329 struct netlbl_lsm_catmap *iter; 330 331 while (catmap) { 332 iter = catmap; 333 catmap = catmap->next; 334 kfree(iter); 335 } 336 } 337 338 /** 339 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct 340 * @secattr: the struct to initialize 341 * 342 * Description: 343 * Initialize an already allocated netlbl_lsm_secattr struct. 344 * 345 */ 346 static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr) 347 { 348 memset(secattr, 0, sizeof(*secattr)); 349 } 350 351 /** 352 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct 353 * @secattr: the struct to clear 354 * 355 * Description: 356 * Destroys the @secattr struct, including freeing all of the internal buffers. 357 * The struct must be reset with a call to netlbl_secattr_init() before reuse. 358 * 359 */ 360 static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr) 361 { 362 if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN) 363 kfree(secattr->domain); 364 if (secattr->flags & NETLBL_SECATTR_CACHE) 365 netlbl_secattr_cache_free(secattr->cache); 366 if (secattr->flags & NETLBL_SECATTR_MLS_CAT) 367 netlbl_catmap_free(secattr->attr.mls.cat); 368 } 369 370 /** 371 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct 372 * @flags: the memory allocation flags 373 * 374 * Description: 375 * Allocate and initialize a netlbl_lsm_secattr struct. Returns a valid 376 * pointer on success, or NULL on failure. 377 * 378 */ 379 static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags) 380 { 381 return kzalloc(sizeof(struct netlbl_lsm_secattr), flags); 382 } 383 384 /** 385 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct 386 * @secattr: the struct to free 387 * 388 * Description: 389 * Frees @secattr including all of the internal buffers. 390 * 391 */ 392 static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr) 393 { 394 netlbl_secattr_destroy(secattr); 395 kfree(secattr); 396 } 397 398 #ifdef CONFIG_NETLABEL 399 /* 400 * LSM configuration operations 401 */ 402 int netlbl_cfg_map_del(const char *domain, 403 u16 family, 404 const void *addr, 405 const void *mask, 406 struct netlbl_audit *audit_info); 407 int netlbl_cfg_unlbl_map_add(const char *domain, 408 u16 family, 409 const void *addr, 410 const void *mask, 411 struct netlbl_audit *audit_info); 412 int netlbl_cfg_unlbl_static_add(struct net *net, 413 const char *dev_name, 414 const void *addr, 415 const void *mask, 416 u16 family, 417 u32 secid, 418 struct netlbl_audit *audit_info); 419 int netlbl_cfg_unlbl_static_del(struct net *net, 420 const char *dev_name, 421 const void *addr, 422 const void *mask, 423 u16 family, 424 struct netlbl_audit *audit_info); 425 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, 426 struct netlbl_audit *audit_info); 427 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info); 428 int netlbl_cfg_cipsov4_map_add(u32 doi, 429 const char *domain, 430 const struct in_addr *addr, 431 const struct in_addr *mask, 432 struct netlbl_audit *audit_info); 433 int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, 434 struct netlbl_audit *audit_info); 435 void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info); 436 int netlbl_cfg_calipso_map_add(u32 doi, 437 const char *domain, 438 const struct in6_addr *addr, 439 const struct in6_addr *mask, 440 struct netlbl_audit *audit_info); 441 /* 442 * LSM security attribute operations 443 */ 444 int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset); 445 int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset); 446 int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, 447 u32 *offset, 448 unsigned long *bitmap); 449 int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, 450 u32 bit, 451 gfp_t flags); 452 int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, 453 u32 start, 454 u32 end, 455 gfp_t flags); 456 int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, 457 u32 offset, 458 unsigned long bitmap, 459 gfp_t flags); 460 461 /* Bitmap functions 462 */ 463 int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len, 464 u32 offset, u8 state); 465 void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state); 466 467 /* 468 * LSM protocol operations (NetLabel LSM/kernel API) 469 */ 470 int netlbl_enabled(void); 471 int netlbl_sock_setattr(struct sock *sk, 472 u16 family, 473 const struct netlbl_lsm_secattr *secattr, 474 bool sk_locked); 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 bool netlbl_sk_lock_check(struct sock *sk); 492 493 /* 494 * LSM label mapping cache operations 495 */ 496 void netlbl_cache_invalidate(void); 497 int netlbl_cache_add(const struct sk_buff *skb, u16 family, 498 const struct netlbl_lsm_secattr *secattr); 499 500 /* 501 * Protocol engine operations 502 */ 503 struct audit_buffer *netlbl_audit_start(int type, 504 struct netlbl_audit *audit_info); 505 #else 506 static inline int netlbl_cfg_map_del(const char *domain, 507 u16 family, 508 const void *addr, 509 const void *mask, 510 struct netlbl_audit *audit_info) 511 { 512 return -ENOSYS; 513 } 514 static inline int netlbl_cfg_unlbl_map_add(const char *domain, 515 u16 family, 516 void *addr, 517 void *mask, 518 struct netlbl_audit *audit_info) 519 { 520 return -ENOSYS; 521 } 522 static inline int netlbl_cfg_unlbl_static_add(struct net *net, 523 const char *dev_name, 524 const void *addr, 525 const void *mask, 526 u16 family, 527 u32 secid, 528 struct netlbl_audit *audit_info) 529 { 530 return -ENOSYS; 531 } 532 static inline int netlbl_cfg_unlbl_static_del(struct net *net, 533 const char *dev_name, 534 const void *addr, 535 const void *mask, 536 u16 family, 537 struct netlbl_audit *audit_info) 538 { 539 return -ENOSYS; 540 } 541 static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, 542 struct netlbl_audit *audit_info) 543 { 544 return -ENOSYS; 545 } 546 static inline void netlbl_cfg_cipsov4_del(u32 doi, 547 struct netlbl_audit *audit_info) 548 { 549 return; 550 } 551 static inline int netlbl_cfg_cipsov4_map_add(u32 doi, 552 const char *domain, 553 const struct in_addr *addr, 554 const struct in_addr *mask, 555 struct netlbl_audit *audit_info) 556 { 557 return -ENOSYS; 558 } 559 static inline int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, 560 struct netlbl_audit *audit_info) 561 { 562 return -ENOSYS; 563 } 564 static inline void netlbl_cfg_calipso_del(u32 doi, 565 struct netlbl_audit *audit_info) 566 { 567 return; 568 } 569 static inline int netlbl_cfg_calipso_map_add(u32 doi, 570 const char *domain, 571 const struct in6_addr *addr, 572 const struct in6_addr *mask, 573 struct netlbl_audit *audit_info) 574 { 575 return -ENOSYS; 576 } 577 static inline int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, 578 u32 offset) 579 { 580 return -ENOENT; 581 } 582 static inline int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, 583 u32 offset) 584 { 585 return -ENOENT; 586 } 587 static inline int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, 588 u32 *offset, 589 unsigned long *bitmap) 590 { 591 return 0; 592 } 593 static inline int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, 594 u32 bit, 595 gfp_t flags) 596 { 597 return 0; 598 } 599 static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, 600 u32 start, 601 u32 end, 602 gfp_t flags) 603 { 604 return 0; 605 } 606 static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, 607 u32 offset, 608 unsigned long bitmap, 609 gfp_t flags) 610 { 611 return 0; 612 } 613 static inline int netlbl_enabled(void) 614 { 615 return 0; 616 } 617 static inline int netlbl_sock_setattr(struct sock *sk, 618 u16 family, 619 const struct netlbl_lsm_secattr *secattr, 620 bool sk_locked) 621 { 622 return -ENOSYS; 623 } 624 static inline void netlbl_sock_delattr(struct sock *sk) 625 { 626 } 627 static inline int netlbl_sock_getattr(struct sock *sk, 628 struct netlbl_lsm_secattr *secattr) 629 { 630 return -ENOSYS; 631 } 632 static inline int netlbl_conn_setattr(struct sock *sk, 633 struct sockaddr *addr, 634 const struct netlbl_lsm_secattr *secattr) 635 { 636 return -ENOSYS; 637 } 638 static inline int netlbl_req_setattr(struct request_sock *req, 639 const struct netlbl_lsm_secattr *secattr) 640 { 641 return -ENOSYS; 642 } 643 static inline void netlbl_req_delattr(struct request_sock *req) 644 { 645 return; 646 } 647 static inline int netlbl_skbuff_setattr(struct sk_buff *skb, 648 u16 family, 649 const struct netlbl_lsm_secattr *secattr) 650 { 651 return -ENOSYS; 652 } 653 static inline int netlbl_skbuff_getattr(const struct sk_buff *skb, 654 u16 family, 655 struct netlbl_lsm_secattr *secattr) 656 { 657 return -ENOSYS; 658 } 659 static inline void netlbl_skbuff_err(struct sk_buff *skb, 660 int error, 661 int gateway) 662 { 663 return; 664 } 665 static inline void netlbl_cache_invalidate(void) 666 { 667 return; 668 } 669 static inline int netlbl_cache_add(const struct sk_buff *skb, u16 family, 670 const struct netlbl_lsm_secattr *secattr) 671 { 672 return 0; 673 } 674 static inline struct audit_buffer *netlbl_audit_start(int type, 675 struct netlbl_audit *audit_info) 676 { 677 return NULL; 678 } 679 680 static inline bool netlbl_sk_lock_check(struct sock *sk) 681 { 682 return true; 683 } 684 #endif /* CONFIG_NETLABEL */ 685 686 const struct netlbl_calipso_ops * 687 netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops); 688 689 #endif /* _NETLABEL_H */ 690