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
28struct cipso_v4_doi;
29struct 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 */
99struct 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 */
124struct 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)
153struct 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 */
179struct 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 */
232struct 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 */
277static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc_noprof(gfp_t flags)
278{
279	struct netlbl_lsm_cache *cache;
280
281	cache = kzalloc_noprof(sizeof(*cache), flags);
282	if (cache)
283		refcount_set(&cache->refcount, 1);
284	return cache;
285}
286#define netlbl_secattr_cache_alloc(...)	\
287		alloc_hooks(netlbl_secattr_cache_alloc_noprof(__VA_ARGS__))
288
289/**
290 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
291 * @cache: the struct to free
292 *
293 * Description:
294 * Frees @secattr including all of the internal buffers.
295 *
296 */
297static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
298{
299	if (!refcount_dec_and_test(&cache->refcount))
300		return;
301
302	if (cache->free)
303		cache->free(cache->data);
304	kfree(cache);
305}
306
307/**
308 * netlbl_catmap_alloc - Allocate a LSM secattr catmap
309 * @flags: memory allocation flags
310 *
311 * Description:
312 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
313 * on failure.
314 *
315 */
316static inline struct netlbl_lsm_catmap *netlbl_catmap_alloc_noprof(gfp_t flags)
317{
318	return kzalloc_noprof(sizeof(struct netlbl_lsm_catmap), flags);
319}
320#define netlbl_catmap_alloc(...)	alloc_hooks(netlbl_catmap_alloc_noprof(__VA_ARGS__))
321
322/**
323 * netlbl_catmap_free - Free a LSM secattr catmap
324 * @catmap: the category bitmap
325 *
326 * Description:
327 * Free a LSM secattr catmap.
328 *
329 */
330static inline void netlbl_catmap_free(struct netlbl_lsm_catmap *catmap)
331{
332	struct netlbl_lsm_catmap *iter;
333
334	while (catmap) {
335		iter = catmap;
336		catmap = catmap->next;
337		kfree(iter);
338	}
339}
340
341/**
342 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
343 * @secattr: the struct to initialize
344 *
345 * Description:
346 * Initialize an already allocated netlbl_lsm_secattr struct.
347 *
348 */
349static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
350{
351	memset(secattr, 0, sizeof(*secattr));
352}
353
354/**
355 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
356 * @secattr: the struct to clear
357 *
358 * Description:
359 * Destroys the @secattr struct, including freeing all of the internal buffers.
360 * The struct must be reset with a call to netlbl_secattr_init() before reuse.
361 *
362 */
363static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
364{
365	if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
366		kfree(secattr->domain);
367	if (secattr->flags & NETLBL_SECATTR_CACHE)
368		netlbl_secattr_cache_free(secattr->cache);
369	if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
370		netlbl_catmap_free(secattr->attr.mls.cat);
371}
372
373/**
374 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct
375 * @flags: the memory allocation flags
376 *
377 * Description:
378 * Allocate and initialize a netlbl_lsm_secattr struct.  Returns a valid
379 * pointer on success, or NULL on failure.
380 *
381 */
382static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc_noprof(gfp_t flags)
383{
384	return kzalloc_noprof(sizeof(struct netlbl_lsm_secattr), flags);
385}
386#define netlbl_secattr_alloc(...)	alloc_hooks(netlbl_secattr_alloc_noprof(__VA_ARGS__))
387
388/**
389 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
390 * @secattr: the struct to free
391 *
392 * Description:
393 * Frees @secattr including all of the internal buffers.
394 *
395 */
396static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
397{
398	netlbl_secattr_destroy(secattr);
399	kfree(secattr);
400}
401
402#ifdef CONFIG_NETLABEL
403/*
404 * LSM configuration operations
405 */
406int netlbl_cfg_map_del(const char *domain,
407		       u16 family,
408		       const void *addr,
409		       const void *mask,
410		       struct netlbl_audit *audit_info);
411int netlbl_cfg_unlbl_map_add(const char *domain,
412			     u16 family,
413			     const void *addr,
414			     const void *mask,
415			     struct netlbl_audit *audit_info);
416int netlbl_cfg_unlbl_static_add(struct net *net,
417				const char *dev_name,
418				const void *addr,
419				const void *mask,
420				u16 family,
421				u32 secid,
422				struct netlbl_audit *audit_info);
423int netlbl_cfg_unlbl_static_del(struct net *net,
424				const char *dev_name,
425				const void *addr,
426				const void *mask,
427				u16 family,
428				struct netlbl_audit *audit_info);
429int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
430			   struct netlbl_audit *audit_info);
431void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
432int netlbl_cfg_cipsov4_map_add(u32 doi,
433			       const char *domain,
434			       const struct in_addr *addr,
435			       const struct in_addr *mask,
436			       struct netlbl_audit *audit_info);
437int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
438			   struct netlbl_audit *audit_info);
439void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info);
440int netlbl_cfg_calipso_map_add(u32 doi,
441			       const char *domain,
442			       const struct in6_addr *addr,
443			       const struct in6_addr *mask,
444			       struct netlbl_audit *audit_info);
445/*
446 * LSM security attribute operations
447 */
448int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset);
449int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset);
450int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
451			  u32 *offset,
452			  unsigned long *bitmap);
453int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
454			 u32 bit,
455			 gfp_t flags);
456int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
457			 u32 start,
458			 u32 end,
459			 gfp_t flags);
460int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
461			  u32 offset,
462			  unsigned long bitmap,
463			  gfp_t flags);
464
465/* Bitmap functions
466 */
467int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
468		       u32 offset, u8 state);
469void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state);
470
471/*
472 * LSM protocol operations (NetLabel LSM/kernel API)
473 */
474int netlbl_enabled(void);
475int netlbl_sock_setattr(struct sock *sk,
476			u16 family,
477			const struct netlbl_lsm_secattr *secattr,
478			bool sk_locked);
479void netlbl_sock_delattr(struct sock *sk);
480int netlbl_sock_getattr(struct sock *sk,
481			struct netlbl_lsm_secattr *secattr);
482int netlbl_conn_setattr(struct sock *sk,
483			struct sockaddr *addr,
484			const struct netlbl_lsm_secattr *secattr);
485int netlbl_req_setattr(struct request_sock *req,
486		       const struct netlbl_lsm_secattr *secattr);
487void netlbl_req_delattr(struct request_sock *req);
488int netlbl_skbuff_setattr(struct sk_buff *skb,
489			  u16 family,
490			  const struct netlbl_lsm_secattr *secattr);
491int netlbl_skbuff_getattr(const struct sk_buff *skb,
492			  u16 family,
493			  struct netlbl_lsm_secattr *secattr);
494void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway);
495bool netlbl_sk_lock_check(struct sock *sk);
496
497/*
498 * LSM label mapping cache operations
499 */
500void netlbl_cache_invalidate(void);
501int netlbl_cache_add(const struct sk_buff *skb, u16 family,
502		     const struct netlbl_lsm_secattr *secattr);
503
504/*
505 * Protocol engine operations
506 */
507struct audit_buffer *netlbl_audit_start(int type,
508					struct netlbl_audit *audit_info);
509#else
510static inline int netlbl_cfg_map_del(const char *domain,
511				     u16 family,
512				     const void *addr,
513				     const void *mask,
514				     struct netlbl_audit *audit_info)
515{
516	return -ENOSYS;
517}
518static inline int netlbl_cfg_unlbl_map_add(const char *domain,
519					   u16 family,
520					   void *addr,
521					   void *mask,
522					   struct netlbl_audit *audit_info)
523{
524	return -ENOSYS;
525}
526static inline int netlbl_cfg_unlbl_static_add(struct net *net,
527					      const char *dev_name,
528					      const void *addr,
529					      const void *mask,
530					      u16 family,
531					      u32 secid,
532					      struct netlbl_audit *audit_info)
533{
534	return -ENOSYS;
535}
536static inline int netlbl_cfg_unlbl_static_del(struct net *net,
537					      const char *dev_name,
538					      const void *addr,
539					      const void *mask,
540					      u16 family,
541					      struct netlbl_audit *audit_info)
542{
543	return -ENOSYS;
544}
545static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
546					 struct netlbl_audit *audit_info)
547{
548	return -ENOSYS;
549}
550static inline void netlbl_cfg_cipsov4_del(u32 doi,
551					  struct netlbl_audit *audit_info)
552{
553	return;
554}
555static inline int netlbl_cfg_cipsov4_map_add(u32 doi,
556					     const char *domain,
557					     const struct in_addr *addr,
558					     const struct in_addr *mask,
559					     struct netlbl_audit *audit_info)
560{
561	return -ENOSYS;
562}
563static inline int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
564					 struct netlbl_audit *audit_info)
565{
566	return -ENOSYS;
567}
568static inline void netlbl_cfg_calipso_del(u32 doi,
569					  struct netlbl_audit *audit_info)
570{
571	return;
572}
573static inline int netlbl_cfg_calipso_map_add(u32 doi,
574					     const char *domain,
575					     const struct in6_addr *addr,
576					     const struct in6_addr *mask,
577					     struct netlbl_audit *audit_info)
578{
579	return -ENOSYS;
580}
581static inline int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap,
582				     u32 offset)
583{
584	return -ENOENT;
585}
586static inline int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap,
587					u32 offset)
588{
589	return -ENOENT;
590}
591static inline int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
592					u32 *offset,
593					unsigned long *bitmap)
594{
595	return 0;
596}
597static inline int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
598				       u32 bit,
599				       gfp_t flags)
600{
601	return 0;
602}
603static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
604				       u32 start,
605				       u32 end,
606				       gfp_t flags)
607{
608	return 0;
609}
610static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
611					u32 offset,
612					unsigned long bitmap,
613					gfp_t flags)
614{
615	return 0;
616}
617static inline int netlbl_enabled(void)
618{
619	return 0;
620}
621static inline int netlbl_sock_setattr(struct sock *sk,
622				      u16 family,
623				      const struct netlbl_lsm_secattr *secattr,
624				      bool sk_locked)
625{
626	return -ENOSYS;
627}
628static inline void netlbl_sock_delattr(struct sock *sk)
629{
630}
631static inline int netlbl_sock_getattr(struct sock *sk,
632				      struct netlbl_lsm_secattr *secattr)
633{
634	return -ENOSYS;
635}
636static inline int netlbl_conn_setattr(struct sock *sk,
637				      struct sockaddr *addr,
638				      const struct netlbl_lsm_secattr *secattr)
639{
640	return -ENOSYS;
641}
642static inline int netlbl_req_setattr(struct request_sock *req,
643				     const struct netlbl_lsm_secattr *secattr)
644{
645	return -ENOSYS;
646}
647static inline void netlbl_req_delattr(struct request_sock *req)
648{
649	return;
650}
651static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
652				      u16 family,
653				      const struct netlbl_lsm_secattr *secattr)
654{
655	return -ENOSYS;
656}
657static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
658					u16 family,
659					struct netlbl_lsm_secattr *secattr)
660{
661	return -ENOSYS;
662}
663static inline void netlbl_skbuff_err(struct sk_buff *skb,
664				     int error,
665				     int gateway)
666{
667	return;
668}
669static inline void netlbl_cache_invalidate(void)
670{
671	return;
672}
673static inline int netlbl_cache_add(const struct sk_buff *skb, u16 family,
674				   const struct netlbl_lsm_secattr *secattr)
675{
676	return 0;
677}
678static inline struct audit_buffer *netlbl_audit_start(int type,
679						struct netlbl_audit *audit_info)
680{
681	return NULL;
682}
683
684static inline bool netlbl_sk_lock_check(struct sock *sk)
685{
686	return true;
687}
688#endif /* CONFIG_NETLABEL */
689
690const struct netlbl_calipso_ops *
691netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops);
692
693#endif /* _NETLABEL_H */
694