[deliverable/linux.git] / include / net / netlabel.h

/*
 * NetLabel System
 *
 * The NetLabel system manages static and dynamic label mappings for network
 * protocols such as CIPSO and RIPSO.
 *
 * Author: Paul Moore <paul.moore@hp.com>
 *
 */

/*
 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
 *
 * This program is free software;  you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program;  if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#ifndef _NETLABEL_H
#define _NETLABEL_H

#include <linux/types.h>
#include <linux/net.h>
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <asm/atomic.h>

/*
 * NetLabel - A management interface for maintaining network packet label
 *            mapping tables for explicit packet labling protocols.
 *
 * Network protocols such as CIPSO and RIPSO require a label translation layer
 * to convert the label on the packet into something meaningful on the host
 * machine.  In the current Linux implementation these mapping tables live
 * inside the kernel; NetLabel provides a mechanism for user space applications
 * to manage these mapping tables.
 *
 * NetLabel makes use of the Generic NETLINK mechanism as a transport layer to
 * send messages between kernel and user space.  The general format of a
 * NetLabel message is shown below:
 *
 *  +-----------------+-------------------+--------- --- -- -
 *  | struct nlmsghdr | struct genlmsghdr | payload
 *  +-----------------+-------------------+--------- --- -- -
 *
 * The 'nlmsghdr' and 'genlmsghdr' structs should be dealt with like normal.
 * The payload is dependent on the subsystem specified in the
 * 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions
 * should be defined in the corresponding net/netlabel/netlabel_<subsys>.h|c
 * file.  All of the fields in the NetLabel payload are NETLINK attributes, see
 * the include/net/netlink.h file for more information on NETLINK attributes.
 *
 */

/*
 * NetLabel NETLINK protocol
 */

#define NETLBL_PROTO_VERSION            1

/* NetLabel NETLINK types/families */
#define NETLBL_NLTYPE_NONE              0
#define NETLBL_NLTYPE_MGMT              1
#define NETLBL_NLTYPE_MGMT_NAME         "NLBL_MGMT"
#define NETLBL_NLTYPE_RIPSO             2
#define NETLBL_NLTYPE_RIPSO_NAME        "NLBL_RIPSO"
#define NETLBL_NLTYPE_CIPSOV4           3
#define NETLBL_NLTYPE_CIPSOV4_NAME      "NLBL_CIPSOv4"
#define NETLBL_NLTYPE_CIPSOV6           4
#define NETLBL_NLTYPE_CIPSOV6_NAME      "NLBL_CIPSOv6"
#define NETLBL_NLTYPE_UNLABELED         5
#define NETLBL_NLTYPE_UNLABELED_NAME    "NLBL_UNLBL"

/*
 * NetLabel - Kernel API for accessing the network packet label mappings.
 *
 * The following functions are provided for use by other kernel modules,
 * specifically kernel LSM modules, to provide a consistent, transparent API
 * for dealing with explicit packet labeling protocols such as CIPSO and
 * RIPSO.  The functions defined here are implemented in the
 * net/netlabel/netlabel_kapi.c file.
 *
 */

/* NetLabel audit information */
struct netlbl_audit {
	u32 secid;
	uid_t loginuid;
};

/* Domain mapping definition struct */
struct netlbl_dom_map;

/* Domain mapping operations */
int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);

/* LSM security attributes */
struct netlbl_lsm_cache {
	atomic_t refcount;
	void (*free) (const void *data);
	void *data;
};
/* The catmap bitmap field MUST be a power of two in length and large
 * enough to hold at least 240 bits.  Special care (i.e. check the code!)
 * should be used when changing these values as the LSM implementation
 * probably has functions which rely on the sizes of these types to speed
 * processing. */
#define NETLBL_CATMAP_MAPTYPE           u64
#define NETLBL_CATMAP_MAPCNT            4
#define NETLBL_CATMAP_MAPSIZE           (sizeof(NETLBL_CATMAP_MAPTYPE) * 8)
#define NETLBL_CATMAP_SIZE              (NETLBL_CATMAP_MAPSIZE * \
					 NETLBL_CATMAP_MAPCNT)
#define NETLBL_CATMAP_BIT               (NETLBL_CATMAP_MAPTYPE)0x01
struct netlbl_lsm_secattr_catmap {
	u32 startbit;
	NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT];
	struct netlbl_lsm_secattr_catmap *next;
};
#define NETLBL_SECATTR_NONE             0x00000000
#define NETLBL_SECATTR_DOMAIN           0x00000001
#define NETLBL_SECATTR_CACHE            0x00000002
#define NETLBL_SECATTR_MLS_LVL          0x00000004
#define NETLBL_SECATTR_MLS_CAT          0x00000008
#define NETLBL_SECATTR_CACHEABLE        (NETLBL_SECATTR_MLS_LVL | \
					 NETLBL_SECATTR_MLS_CAT)
struct netlbl_lsm_secattr {
	u32 flags;

	char *domain;

	u32 mls_lvl;
	struct netlbl_lsm_secattr_catmap *mls_cat;

	struct netlbl_lsm_cache *cache;
};

/*
 * LSM security attribute operations (inline)
 */

/**
 * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache
 * @flags: the memory allocation flags
 *
 * Description:
 * Allocate and initialize a netlbl_lsm_cache structure.  Returns a pointer
 * on success, NULL on failure.
 *
 */
static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags)
{
	struct netlbl_lsm_cache *cache;

	cache = kzalloc(sizeof(*cache), flags);
	if (cache)
		atomic_set(&cache->refcount, 1);
	return cache;
}

/**
 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
 * @cache: the struct to free
 *
 * Description:
 * Frees @secattr including all of the internal buffers.
 *
 */
static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
{
	if (!atomic_dec_and_test(&cache->refcount))
		return;

	if (cache->free)
		cache->free(cache->data);
	kfree(cache);
}

/**
 * netlbl_secattr_catmap_alloc - Allocate a LSM secattr catmap
 * @flags: memory allocation flags
 *
 * Description:
 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
 * on failure.
 *
 */
static inline struct netlbl_lsm_secattr_catmap *netlbl_secattr_catmap_alloc(
	                                                           gfp_t flags)
{
	return kzalloc(sizeof(struct netlbl_lsm_secattr_catmap), flags);
}

/**
 * netlbl_secattr_catmap_free - Free a LSM secattr catmap
 * @catmap: the category bitmap
 *
 * Description:
 * Free a LSM secattr catmap.
 *
 */
static inline void netlbl_secattr_catmap_free(
	                              struct netlbl_lsm_secattr_catmap *catmap)
{
	struct netlbl_lsm_secattr_catmap *iter;

	do {
		iter = catmap;
		catmap = catmap->next;
		kfree(iter);
	} while (catmap);
}

/**
 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
 * @secattr: the struct to initialize
 *
 * Description:
 * Initialize an already allocated netlbl_lsm_secattr struct.
 *
 */
static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
{
	secattr->flags = 0;
	secattr->domain = NULL;
	secattr->mls_cat = NULL;
	secattr->cache = NULL;
}

/**
 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
 * @secattr: the struct to clear
 *
 * Description:
 * Destroys the @secattr struct, including freeing all of the internal buffers.
 * The struct must be reset with a call to netlbl_secattr_init() before reuse.
 *
 */
static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
{
	if (secattr->cache)
		netlbl_secattr_cache_free(secattr->cache);
	kfree(secattr->domain);
	if (secattr->mls_cat)
		netlbl_secattr_catmap_free(secattr->mls_cat);
}

/**
 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct
 * @flags: the memory allocation flags
 *
 * Description:
 * Allocate and initialize a netlbl_lsm_secattr struct.  Returns a valid
 * pointer on success, or NULL on failure.
 *
 */
static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags)
{
	return kzalloc(sizeof(struct netlbl_lsm_secattr), flags);
}

/**
 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
 * @secattr: the struct to free
 *
 * Description:
 * Frees @secattr including all of the internal buffers.
 *
 */
static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
{
	netlbl_secattr_destroy(secattr);
	kfree(secattr);
}

#ifdef CONFIG_NETLABEL
/*
 * LSM security attribute operations
 */
int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
			       u32 offset);
int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
				   u32 offset);
int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
				 u32 bit,
				 gfp_t flags);
int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
				 u32 start,
				 u32 end,
				 gfp_t flags);

/*
 * LSM protocol operations
 */
int netlbl_enabled(void);
int netlbl_sock_setattr(struct sock *sk,
			const struct netlbl_lsm_secattr *secattr);
int netlbl_sock_getattr(struct sock *sk,
			struct netlbl_lsm_secattr *secattr);
int netlbl_skbuff_getattr(const struct sk_buff *skb,
			  struct netlbl_lsm_secattr *secattr);
void netlbl_skbuff_err(struct sk_buff *skb, int error);

/*
 * LSM label mapping cache operations
 */
void netlbl_cache_invalidate(void);
int netlbl_cache_add(const struct sk_buff *skb,
		     const struct netlbl_lsm_secattr *secattr);
#else
static inline int netlbl_secattr_catmap_walk(
	                              struct netlbl_lsm_secattr_catmap *catmap,
				      u32 offset)
{
	return -ENOENT;
}
static inline int netlbl_secattr_catmap_walk_rng(
				      struct netlbl_lsm_secattr_catmap *catmap,
				      u32 offset)
{
	return -ENOENT;
}
static inline int netlbl_secattr_catmap_setbit(
	                              struct netlbl_lsm_secattr_catmap *catmap,
				      u32 bit,
				      gfp_t flags)
{
	return 0;
}
static inline int netlbl_secattr_catmap_setrng(
	                              struct netlbl_lsm_secattr_catmap *catmap,
				      u32 start,
				      u32 end,
				      gfp_t flags)
{
	return 0;
}
static inline int netlbl_enabled(void)
{
	return 0;
}
static inline int netlbl_sock_setattr(struct sock *sk,
				     const struct netlbl_lsm_secattr *secattr)
{
	return -ENOSYS;
}
static inline int netlbl_sock_getattr(struct sock *sk,
				      struct netlbl_lsm_secattr *secattr)
{
	return -ENOSYS;
}
static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
					struct netlbl_lsm_secattr *secattr)
{
	return -ENOSYS;
}
static inline void netlbl_skbuff_err(struct sk_buff *skb, int error)
{
	return;
}
static inline void netlbl_cache_invalidate(void)
{
	return;
}
static inline int netlbl_cache_add(const struct sk_buff *skb,
				   const struct netlbl_lsm_secattr *secattr)
{
	return 0;
}
#endif /* CONFIG_NETLABEL */

#endif /* _NETLABEL_H */
Commit	Line	Data
11a03f78 PM	1	/*
	2	* NetLabel System
	3	*
	4	* The NetLabel system manages static and dynamic label mappings for network
	5	* protocols such as CIPSO and RIPSO.
	6	*
	7	* Author: Paul Moore <paul.moore@hp.com>
	8	*
	9	*/
	10
	11	/*
	12	* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License as published by
	16	* the Free Software Foundation; either version 2 of the License, or
	17	* (at your option) any later version.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	22	* the GNU General Public License for more details.
	23	*
	24	* You should have received a copy of the GNU General Public License
	25	* along with this program; if not, write to the Free Software
	26	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	27	*
	28	*/
	29
	30	#ifndef _NETLABEL_H
	31	#define _NETLABEL_H
	32
	33	#include <linux/types.h>
7a0e1d60	34	#include <linux/net.h>
11a03f78 PM	35	#include <linux/skbuff.h>
11a03f78 PM	36	#include <net/netlink.h>
ffb733c6	37	#include <asm/atomic.h>
11a03f78 PM	38
	39	/*
	40	* NetLabel - A management interface for maintaining network packet label
	41	* mapping tables for explicit packet labling protocols.
	42	*
	43	* Network protocols such as CIPSO and RIPSO require a label translation layer
	44	* to convert the label on the packet into something meaningful on the host
	45	* machine. In the current Linux implementation these mapping tables live
	46	* inside the kernel; NetLabel provides a mechanism for user space applications
	47	* to manage these mapping tables.
	48	*
	49	* NetLabel makes use of the Generic NETLINK mechanism as a transport layer to
	50	* send messages between kernel and user space. The general format of a
	51	* NetLabel message is shown below:
	52	*
	53	* +-----------------+-------------------+--------- --- -- -
	54	* \| struct nlmsghdr \| struct genlmsghdr \| payload
	55	* +-----------------+-------------------+--------- --- -- -
	56	*
	57	* The 'nlmsghdr' and 'genlmsghdr' structs should be dealt with like normal.
	58	* The payload is dependent on the subsystem specified in the
	59	* 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions
	60	* should be defined in the corresponding net/netlabel/netlabel_<subsys>.h\|c
fcd48280 PM	61	* file. All of the fields in the NetLabel payload are NETLINK attributes, see
fcd48280 PM	62	* the include/net/netlink.h file for more information on NETLINK attributes.
11a03f78 PM	63	*
	64	*/
	65
	66	/*
	67	* NetLabel NETLINK protocol
	68	*/
	69
	70	#define NETLBL_PROTO_VERSION 1
	71
	72	/* NetLabel NETLINK types/families */
	73	#define NETLBL_NLTYPE_NONE 0
	74	#define NETLBL_NLTYPE_MGMT 1
	75	#define NETLBL_NLTYPE_MGMT_NAME "NLBL_MGMT"
	76	#define NETLBL_NLTYPE_RIPSO 2
	77	#define NETLBL_NLTYPE_RIPSO_NAME "NLBL_RIPSO"
	78	#define NETLBL_NLTYPE_CIPSOV4 3
	79	#define NETLBL_NLTYPE_CIPSOV4_NAME "NLBL_CIPSOv4"
	80	#define NETLBL_NLTYPE_CIPSOV6 4
	81	#define NETLBL_NLTYPE_CIPSOV6_NAME "NLBL_CIPSOv6"
	82	#define NETLBL_NLTYPE_UNLABELED 5
	83	#define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL"
	84
11a03f78 PM	85	/*
	86	* NetLabel - Kernel API for accessing the network packet label mappings.
	87	*
	88	* The following functions are provided for use by other kernel modules,
	89	* specifically kernel LSM modules, to provide a consistent, transparent API
	90	* for dealing with explicit packet labeling protocols such as CIPSO and
	91	* RIPSO. The functions defined here are implemented in the
	92	* net/netlabel/netlabel_kapi.c file.
	93	*
	94	*/
	95
95d4e6be PM	96	/* NetLabel audit information */
	97	struct netlbl_audit {
	98	u32 secid;
	99	uid_t loginuid;
	100	};
	101
11a03f78 PM	102	/* Domain mapping definition struct */
	103	struct netlbl_dom_map;
	104
	105	/* Domain mapping operations */
95d4e6be	106	int netlbl_domhsh_remove(const char domain, struct netlbl_audit audit_info);
11a03f78 PM	107
	108	/* LSM security attributes */
	109	struct netlbl_lsm_cache {
ffb733c6	110	atomic_t refcount;
11a03f78 PM	111	void (free) (const void data);
	112	void *data;
	113	};
02752760 PM	114	/* The catmap bitmap field MUST be a power of two in length and large
	115	* enough to hold at least 240 bits. Special care (i.e. check the code!)
	116	* should be used when changing these values as the LSM implementation
	117	* probably has functions which rely on the sizes of these types to speed
	118	* processing. */
	119	#define NETLBL_CATMAP_MAPTYPE u64
	120	#define NETLBL_CATMAP_MAPCNT 4
	121	#define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8)
	122	#define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \
	123	NETLBL_CATMAP_MAPCNT)
	124	#define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01
	125	struct netlbl_lsm_secattr_catmap {
	126	u32 startbit;
	127	NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT];
	128	struct netlbl_lsm_secattr_catmap *next;
	129	};
701a90ba PM	130	#define NETLBL_SECATTR_NONE 0x00000000
	131	#define NETLBL_SECATTR_DOMAIN 0x00000001
	132	#define NETLBL_SECATTR_CACHE 0x00000002
	133	#define NETLBL_SECATTR_MLS_LVL 0x00000004
	134	#define NETLBL_SECATTR_MLS_CAT 0x00000008
9534f71c PM	135	#define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL \| \
9534f71c PM	136	NETLBL_SECATTR_MLS_CAT)
11a03f78	137	struct netlbl_lsm_secattr {
701a90ba PM	138	u32 flags;
701a90ba PM	139
11a03f78 PM	140	char *domain;
	141
	142	u32 mls_lvl;
02752760	143	struct netlbl_lsm_secattr_catmap *mls_cat;
11a03f78	144
ffb733c6	145	struct netlbl_lsm_cache *cache;
11a03f78 PM	146	};
	147
	148	/*
23bcdc1a	149	* LSM security attribute operations (inline)
11a03f78 PM	150	*/
11a03f78 PM	151
ffb733c6	152	/**
	153	* netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache
	154	* @flags: the memory allocation flags
	155	*
	156	* Description:
	157	* Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer
	158	* on success, NULL on failure.
	159	*
	160	*/
645408d1	161	static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags)
ffb733c6	162	{
	163	struct netlbl_lsm_cache *cache;
	164
	165	cache = kzalloc(sizeof(*cache), flags);
	166	if (cache)
	167	atomic_set(&cache->refcount, 1);
	168	return cache;
	169	}
	170
	171	/**
	172	* netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
	173	* @cache: the struct to free
	174	*
	175	* Description:
	176	* Frees @secattr including all of the internal buffers.
	177	*
	178	*/
	179	static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
	180	{
	181	if (!atomic_dec_and_test(&cache->refcount))
	182	return;
	183
	184	if (cache->free)
	185	cache->free(cache->data);
	186	kfree(cache);
	187	}
	188
02752760 PM	189	/**
	190	* netlbl_secattr_catmap_alloc - Allocate a LSM secattr catmap
	191	* @flags: memory allocation flags
	192	*
	193	* Description:
	194	* Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
	195	* on failure.
	196	*
	197	*/
	198	static inline struct netlbl_lsm_secattr_catmap *netlbl_secattr_catmap_alloc(
	199	gfp_t flags)
	200	{
	201	return kzalloc(sizeof(struct netlbl_lsm_secattr_catmap), flags);
	202	}
	203
	204	/**
	205	* netlbl_secattr_catmap_free - Free a LSM secattr catmap
	206	* @catmap: the category bitmap
	207	*
	208	* Description:
	209	* Free a LSM secattr catmap.
	210	*
	211	*/
	212	static inline void netlbl_secattr_catmap_free(
	213	struct netlbl_lsm_secattr_catmap *catmap)
	214	{
	215	struct netlbl_lsm_secattr_catmap *iter;
	216
	217	do {
	218	iter = catmap;
	219	catmap = catmap->next;
	220	kfree(iter);
	221	} while (catmap);
	222	}
	223
11a03f78 PM	224	/**
	225	* netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
	226	* @secattr: the struct to initialize
	227	*
	228	* Description:
c6fa82a9	229	* Initialize an already allocated netlbl_lsm_secattr struct.
11a03f78 PM	230	*
11a03f78 PM	231	*/
c6fa82a9	232	static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
11a03f78	233	{
701a90ba PM	234	secattr->flags = 0;
	235	secattr->domain = NULL;
	236	secattr->mls_cat = NULL;
	237	secattr->cache = NULL;
11a03f78 PM	238	}
	239
	240	/**
	241	* netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
	242	* @secattr: the struct to clear
11a03f78 PM	243	*
	244	* Description:
	245	* Destroys the @secattr struct, including freeing all of the internal buffers.
ffb733c6	246	* The struct must be reset with a call to netlbl_secattr_init() before reuse.
11a03f78 PM	247	*
11a03f78 PM	248	*/
ffb733c6	249	static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
11a03f78	250	{
ffb733c6	251	if (secattr->cache)
ffb733c6	252	netlbl_secattr_cache_free(secattr->cache);
11a03f78	253	kfree(secattr->domain);
02752760 PM	254	if (secattr->mls_cat)
02752760 PM	255	netlbl_secattr_catmap_free(secattr->mls_cat);
11a03f78 PM	256	}
	257
	258	/**
	259	* netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct
	260	* @flags: the memory allocation flags
	261	*
	262	* Description:
	263	* Allocate and initialize a netlbl_lsm_secattr struct. Returns a valid
	264	* pointer on success, or NULL on failure.
	265	*
	266	*/
1f758d93	267	static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags)
11a03f78 PM	268	{
	269	return kzalloc(sizeof(struct netlbl_lsm_secattr), flags);
	270	}
	271
	272	/**
	273	* netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
	274	* @secattr: the struct to free
11a03f78 PM	275	*
11a03f78 PM	276	* Description:
ffb733c6	277	* Frees @secattr including all of the internal buffers.
11a03f78 PM	278	*
11a03f78 PM	279	*/
ffb733c6	280	static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
11a03f78	281	{
ffb733c6	282	netlbl_secattr_destroy(secattr);
11a03f78 PM	283	kfree(secattr);
	284	}
	285
02752760	286	#ifdef CONFIG_NETLABEL
23bcdc1a PM	287	/*
	288	* LSM security attribute operations
	289	*/
02752760 PM	290	int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
	291	u32 offset);
	292	int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
	293	u32 offset);
	294	int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
	295	u32 bit,
	296	gfp_t flags);
	297	int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
	298	u32 start,
	299	u32 end,
	300	gfp_t flags);
23bcdc1a PM	301
	302	/*
	303	* LSM protocol operations
	304	*/
	305	int netlbl_enabled(void);
	306	int netlbl_sock_setattr(struct sock *sk,
	307	const struct netlbl_lsm_secattr *secattr);
	308	int netlbl_sock_getattr(struct sock *sk,
	309	struct netlbl_lsm_secattr *secattr);
	310	int netlbl_skbuff_getattr(const struct sk_buff *skb,
	311	struct netlbl_lsm_secattr *secattr);
	312	void netlbl_skbuff_err(struct sk_buff *skb, int error);
	313
	314	/*
	315	* LSM label mapping cache operations
	316	*/
	317	void netlbl_cache_invalidate(void);
	318	int netlbl_cache_add(const struct sk_buff *skb,
	319	const struct netlbl_lsm_secattr *secattr);
02752760 PM	320	#else
	321	static inline int netlbl_secattr_catmap_walk(
	322	struct netlbl_lsm_secattr_catmap *catmap,
	323	u32 offset)
	324	{
	325	return -ENOENT;
	326	}
02752760 PM	327	static inline int netlbl_secattr_catmap_walk_rng(
	328	struct netlbl_lsm_secattr_catmap *catmap,
	329	u32 offset)
	330	{
	331	return -ENOENT;
	332	}
02752760 PM	333	static inline int netlbl_secattr_catmap_setbit(
	334	struct netlbl_lsm_secattr_catmap *catmap,
	335	u32 bit,
	336	gfp_t flags)
	337	{
	338	return 0;
	339	}
02752760 PM	340	static inline int netlbl_secattr_catmap_setrng(
	341	struct netlbl_lsm_secattr_catmap *catmap,
	342	u32 start,
	343	u32 end,
	344	gfp_t flags)
	345	{
	346	return 0;
	347	}
23bcdc1a PM	348	static inline int netlbl_enabled(void)
	349	{
	350	return 0;
	351	}
ba6ff9f2	352	static inline int netlbl_sock_setattr(struct sock *sk,
11a03f78 PM	353	const struct netlbl_lsm_secattr *secattr)
	354	{
	355	return -ENOSYS;
	356	}
14a72f53 PM	357	static inline int netlbl_sock_getattr(struct sock *sk,
	358	struct netlbl_lsm_secattr *secattr)
	359	{
	360	return -ENOSYS;
	361	}
11a03f78 PM	362	static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
	363	struct netlbl_lsm_secattr *secattr)
	364	{
	365	return -ENOSYS;
	366	}
11a03f78 PM	367	static inline void netlbl_skbuff_err(struct sk_buff *skb, int error)
	368	{
	369	return;
	370	}
11a03f78 PM	371	static inline void netlbl_cache_invalidate(void)
	372	{
	373	return;
	374	}
11a03f78 PM	375	static inline int netlbl_cache_add(const struct sk_buff *skb,
	376	const struct netlbl_lsm_secattr *secattr)
	377	{
	378	return 0;
	379	}
	380	#endif /* CONFIG_NETLABEL */
	381
	382	#endif /* _NETLABEL_H */