[mirror_ubuntu-artful-kernel.git] / security / selinux / ss / policydb.h

/*
 * A policy database (policydb) specifies the
 * configuration data for the security policy.
 *
 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
 */

/*
 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
 *
 *	Support for enhanced MLS infrastructure.
 *
 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
 *
 *	Added conditional policy language extensions
 *
 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
 *	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, version 2.
 */

#ifndef _SS_POLICYDB_H_
#define _SS_POLICYDB_H_

#include <linux/flex_array.h>

#include "symtab.h"
#include "avtab.h"
#include "sidtab.h"
#include "ebitmap.h"
#include "mls_types.h"
#include "context.h"
#include "constraint.h"

/*
 * A datum type is defined for each kind of symbol
 * in the configuration data:  individual permissions,
 * common prefixes for access vectors, classes,
 * users, roles, types, sensitivities, categories, etc.
 */

/* Permission attributes */
struct perm_datum {
	u32 value;		/* permission bit + 1 */
};

/* Attributes of a common prefix for access vectors */
struct common_datum {
	u32 value;			/* internal common value */
	struct symtab permissions;	/* common permissions */
};

/* Class attributes */
struct class_datum {
	u32 value;			/* class value */
	char *comkey;			/* common name */
	struct common_datum *comdatum;	/* common datum */
	struct symtab permissions;	/* class-specific permission symbol table */
	struct constraint_node *constraints;	/* constraints on class permissions */
	struct constraint_node *validatetrans;	/* special transition rules */
/* Options how a new object user, role, and type should be decided */
#define DEFAULT_SOURCE         1
#define DEFAULT_TARGET         2
	char default_user;
	char default_role;
	char default_type;
/* Options how a new object range should be decided */
#define DEFAULT_SOURCE_LOW     1
#define DEFAULT_SOURCE_HIGH    2
#define DEFAULT_SOURCE_LOW_HIGH        3
#define DEFAULT_TARGET_LOW     4
#define DEFAULT_TARGET_HIGH    5
#define DEFAULT_TARGET_LOW_HIGH        6
	char default_range;
};

/* Role attributes */
struct role_datum {
	u32 value;			/* internal role value */
	u32 bounds;			/* boundary of role */
	struct ebitmap dominates;	/* set of roles dominated by this role */
	struct ebitmap types;		/* set of authorized types for role */
};

struct role_trans {
	u32 role;		/* current role */
	u32 type;		/* program executable type, or new object type */
	u32 tclass;		/* process class, or new object class */
	u32 new_role;		/* new role */
	struct role_trans *next;
};

struct filename_trans {
	u32 stype;		/* current process */
	u32 ttype;		/* parent dir context */
	u16 tclass;		/* class of new object */
	const char *name;	/* last path component */
};

struct filename_trans_datum {
	u32 otype;		/* expected of new object */
};

struct role_allow {
	u32 role;		/* current role */
	u32 new_role;		/* new role */
	struct role_allow *next;
};

/* Type attributes */
struct type_datum {
	u32 value;		/* internal type value */
	u32 bounds;		/* boundary of type */
	unsigned char primary;	/* primary name? */
	unsigned char attribute;/* attribute ?*/
};

/* User attributes */
struct user_datum {
	u32 value;			/* internal user value */
	u32 bounds;			/* bounds of user */
	struct ebitmap roles;		/* set of authorized roles for user */
	struct mls_range range;		/* MLS range (min - max) for user */
	struct mls_level dfltlevel;	/* default login MLS level for user */
};


/* Sensitivity attributes */
struct level_datum {
	struct mls_level *level;	/* sensitivity and associated categories */
	unsigned char isalias;	/* is this sensitivity an alias for another? */
};

/* Category attributes */
struct cat_datum {
	u32 value;		/* internal category bit + 1 */
	unsigned char isalias;  /* is this category an alias for another? */
};

struct range_trans {
	u32 source_type;
	u32 target_type;
	u32 target_class;
};

/* Boolean data type */
struct cond_bool_datum {
	__u32 value;		/* internal type value */
	int state;
};

struct cond_node;

/*
 * type set preserves data needed to determine constraint info from
 * policy source. This is not used by the kernel policy but allows
 * utilities such as audit2allow to determine constraint denials.
 */
struct type_set {
	struct ebitmap types;
	struct ebitmap negset;
	u32 flags;
};

/*
 * The configuration data includes security contexts for
 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
 * network interfaces, and nodes.  This structure stores the
 * relevant data for one such entry.  Entries of the same kind
 * (e.g. all initial SIDs) are linked together into a list.
 */
struct ocontext {
	union {
		char *name;	/* name of initial SID, fs, netif, fstype, path */
		struct {
			u8 protocol;
			u16 low_port;
			u16 high_port;
		} port;		/* TCP or UDP port information */
		struct {
			u32 addr;
			u32 mask;
		} node;		/* node information */
		struct {
			u32 addr[4];
			u32 mask[4];
		} node6;        /* IPv6 node information */
		struct {
			u64 subnet_prefix;
			u16 low_pkey;
			u16 high_pkey;
		} ibpkey;
		struct {
			char *dev_name;
			u8 port;
		} ibendport;
	} u;
	union {
		u32 sclass;  /* security class for genfs */
		u32 behavior;  /* labeling behavior for fs_use */
	} v;
	struct context context[2];	/* security context(s) */
	u32 sid[2];	/* SID(s) */
	struct ocontext *next;
};

struct genfs {
	char *fstype;
	struct ocontext *head;
	struct genfs *next;
};

/* symbol table array indices */
#define SYM_COMMONS 0
#define SYM_CLASSES 1
#define SYM_ROLES   2
#define SYM_TYPES   3
#define SYM_USERS   4
#define SYM_BOOLS   5
#define SYM_LEVELS  6
#define SYM_CATS    7
#define SYM_NUM     8

/* object context array indices */
#define OCON_ISID	0 /* initial SIDs */
#define OCON_FS		1 /* unlabeled file systems */
#define OCON_PORT	2 /* TCP and UDP port numbers */
#define OCON_NETIF	3 /* network interfaces */
#define OCON_NODE	4 /* nodes */
#define OCON_FSUSE	5 /* fs_use */
#define OCON_NODE6	6 /* IPv6 nodes */
#define OCON_IBPKEY	7 /* Infiniband PKeys */
#define OCON_IBENDPORT	8 /* Infiniband end ports */
#define OCON_NUM	9

/* The policy database */
struct policydb {
	int mls_enabled;

	/* symbol tables */
	struct symtab symtab[SYM_NUM];
#define p_commons symtab[SYM_COMMONS]
#define p_classes symtab[SYM_CLASSES]
#define p_roles symtab[SYM_ROLES]
#define p_types symtab[SYM_TYPES]
#define p_users symtab[SYM_USERS]
#define p_bools symtab[SYM_BOOLS]
#define p_levels symtab[SYM_LEVELS]
#define p_cats symtab[SYM_CATS]

	/* symbol names indexed by (value - 1) */
	struct flex_array *sym_val_to_name[SYM_NUM];

	/* class, role, and user attributes indexed by (value - 1) */
	struct class_datum **class_val_to_struct;
	struct role_datum **role_val_to_struct;
	struct user_datum **user_val_to_struct;
	struct flex_array *type_val_to_struct_array;

	/* type enforcement access vectors and transitions */
	struct avtab te_avtab;

	/* role transitions */
	struct role_trans *role_tr;

	/* file transitions with the last path component */
	/* quickly exclude lookups when parent ttype has no rules */
	struct ebitmap filename_trans_ttypes;
	/* actual set of filename_trans rules */
	struct hashtab *filename_trans;

	/* bools indexed by (value - 1) */
	struct cond_bool_datum **bool_val_to_struct;
	/* type enforcement conditional access vectors and transitions */
	struct avtab te_cond_avtab;
	/* linked list indexing te_cond_avtab by conditional */
	struct cond_node *cond_list;

	/* role allows */
	struct role_allow *role_allow;

	/* security contexts of initial SIDs, unlabeled file systems,
	   TCP or UDP port numbers, network interfaces and nodes */
	struct ocontext *ocontexts[OCON_NUM];

	/* security contexts for files in filesystems that cannot support
	   a persistent label mapping or use another
	   fixed labeling behavior. */
	struct genfs *genfs;

	/* range transitions table (range_trans_key -> mls_range) */
	struct hashtab *range_tr;

	/* type -> attribute reverse mapping */
	struct flex_array *type_attr_map_array;

	struct ebitmap policycaps;

	struct ebitmap permissive_map;

	/* length of this policy when it was loaded */
	size_t len;

	unsigned int policyvers;

	unsigned int reject_unknown : 1;
	unsigned int allow_unknown : 1;

	u16 process_class;
	u32 process_trans_perms;
};

extern void policydb_destroy(struct policydb *p);
extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
extern int policydb_context_isvalid(struct policydb *p, struct context *c);
extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
extern int policydb_read(struct policydb *p, void *fp);
extern int policydb_write(struct policydb *p, void *fp);

#define PERM_SYMTAB_SIZE 32

#define POLICYDB_CONFIG_MLS    1

/* the config flags related to unknown classes/perms are bits 2 and 3 */
#define REJECT_UNKNOWN	0x00000002
#define ALLOW_UNKNOWN	0x00000004

#define OBJECT_R "object_r"
#define OBJECT_R_VAL 1

#define POLICYDB_MAGIC SELINUX_MAGIC
#define POLICYDB_STRING "SE Linux"

struct policy_file {
	char *data;
	size_t len;
};

struct policy_data {
	struct policydb *p;
	void *fp;
};

static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
{
	if (bytes > fp->len)
		return -EINVAL;

	memcpy(buf, fp->data, bytes);
	fp->data += bytes;
	fp->len -= bytes;
	return 0;
}

static inline int put_entry(const void *buf, size_t bytes, int num, struct policy_file *fp)
{
	size_t len = bytes * num;

	memcpy(fp->data, buf, len);
	fp->data += len;
	fp->len -= len;

	return 0;
}

static inline char *sym_name(struct policydb *p, unsigned int sym_num, unsigned int element_nr)
{
	struct flex_array *fa = p->sym_val_to_name[sym_num];

	return flex_array_get_ptr(fa, element_nr);
}

extern u16 string_to_security_class(struct policydb *p, const char *name);
extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);

#endif	/* _SS_POLICYDB_H_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* A policy database (policydb) specifies the
	3	* configuration data for the security policy.
	4	*
	5	* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
	6	*/
	7
	8	/*
	9	* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
	10	*
	11	* Support for enhanced MLS infrastructure.
	12	*
	13	* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
	14	*
489a5fd7	15	* Added conditional policy language extensions
1da177e4 LT	16	*
	17	* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
	18	* Copyright (C) 2003 - 2004 Tresys Technology, LLC
	19	* This program is free software; you can redistribute it and/or modify
489a5fd7	20	* it under the terms of the GNU General Public License as published by
1da177e4 LT	21	* the Free Software Foundation, version 2.
	22	*/
	23
	24	#ifndef _SS_POLICYDB_H_
	25	#define _SS_POLICYDB_H_
	26
6371dcd3 EP	27	#include <linux/flex_array.h>
6371dcd3 EP	28
1da177e4 LT	29	#include "symtab.h"
	30	#include "avtab.h"
	31	#include "sidtab.h"
0719aaf5 GT	32	#include "ebitmap.h"
0719aaf5 GT	33	#include "mls_types.h"
1da177e4 LT	34	#include "context.h"
	35	#include "constraint.h"
	36
	37	/*
	38	* A datum type is defined for each kind of symbol
	39	* in the configuration data: individual permissions,
	40	* common prefixes for access vectors, classes,
	41	* users, roles, types, sensitivities, categories, etc.
	42	*/
	43
	44	/* Permission attributes */
	45	struct perm_datum {
	46	u32 value; /* permission bit + 1 */
	47	};
	48
	49	/* Attributes of a common prefix for access vectors */
	50	struct common_datum {
	51	u32 value; /* internal common value */
	52	struct symtab permissions; /* common permissions */
	53	};
	54
	55	/* Class attributes */
	56	struct class_datum {
	57	u32 value; /* class value */
	58	char comkey; / common name */
	59	struct common_datum comdatum; / common datum */
	60	struct symtab permissions; /* class-specific permission symbol table */
	61	struct constraint_node constraints; / constraints on class permissions */
	62	struct constraint_node validatetrans; / special transition rules */
eed7795d	63	/* Options how a new object user, role, and type should be decided */
aa893269 EP	64	#define DEFAULT_SOURCE 1
	65	#define DEFAULT_TARGET 2
	66	char default_user;
	67	char default_role;
eed7795d	68	char default_type;
aa893269 EP	69	/* Options how a new object range should be decided */
	70	#define DEFAULT_SOURCE_LOW 1
	71	#define DEFAULT_SOURCE_HIGH 2
	72	#define DEFAULT_SOURCE_LOW_HIGH 3
	73	#define DEFAULT_TARGET_LOW 4
	74	#define DEFAULT_TARGET_HIGH 5
	75	#define DEFAULT_TARGET_LOW_HIGH 6
	76	char default_range;
1da177e4 LT	77	};
	78
	79	/* Role attributes */
	80	struct role_datum {
	81	u32 value; /* internal role value */
d9250dea	82	u32 bounds; /* boundary of role */
1da177e4 LT	83	struct ebitmap dominates; /* set of roles dominated by this role */
	84	struct ebitmap types; /* set of authorized types for role */
	85	};
	86
	87	struct role_trans {
	88	u32 role; /* current role */
8023976c HC	89	u32 type; /* program executable type, or new object type */
8023976c HC	90	u32 tclass; /* process class, or new object class */
1da177e4 LT	91	u32 new_role; /* new role */
	92	struct role_trans *next;
	93	};
	94
652bb9b0	95	struct filename_trans {
652bb9b0 EP	96	u32 stype; /* current process */
	97	u32 ttype; /* parent dir context */
	98	u16 tclass; /* class of new object */
	99	const char name; / last path component */
2463c26d EP	100	};
	101
	102	struct filename_trans_datum {
652bb9b0 EP	103	u32 otype; /* expected of new object */
	104	};
	105
1da177e4 LT	106	struct role_allow {
	107	u32 role; /* current role */
	108	u32 new_role; /* new role */
	109	struct role_allow *next;
	110	};
	111
	112	/* Type attributes */
	113	struct type_datum {
	114	u32 value; /* internal type value */
d9250dea	115	u32 bounds; /* boundary of type */
1da177e4	116	unsigned char primary; /* primary name? */
d9250dea	117	unsigned char attribute;/* attribute ?*/
1da177e4 LT	118	};
	119
	120	/* User attributes */
	121	struct user_datum {
	122	u32 value; /* internal user value */
d9250dea	123	u32 bounds; /* bounds of user */
1da177e4 LT	124	struct ebitmap roles; /* set of authorized roles for user */
	125	struct mls_range range; /* MLS range (min - max) for user */
	126	struct mls_level dfltlevel; /* default login MLS level for user */
	127	};
	128
	129
	130	/* Sensitivity attributes */
	131	struct level_datum {
	132	struct mls_level level; / sensitivity and associated categories */
	133	unsigned char isalias; /* is this sensitivity an alias for another? */
	134	};
	135
	136	/* Category attributes */
	137	struct cat_datum {
	138	u32 value; /* internal category bit + 1 */
	139	unsigned char isalias; /* is this category an alias for another? */
	140	};
	141
	142	struct range_trans {
f3f87714 DG	143	u32 source_type;
	144	u32 target_type;
	145	u32 target_class;
1da177e4 LT	146	};
	147
	148	/* Boolean data type */
	149	struct cond_bool_datum {
	150	__u32 value; /* internal type value */
	151	int state;
	152	};
	153
	154	struct cond_node;
	155
a660bec1 RH	156	/*
	157	* type set preserves data needed to determine constraint info from
	158	* policy source. This is not used by the kernel policy but allows
	159	* utilities such as audit2allow to determine constraint denials.
	160	*/
	161	struct type_set {
	162	struct ebitmap types;
	163	struct ebitmap negset;
	164	u32 flags;
	165	};
	166
1da177e4 LT	167	/*
	168	* The configuration data includes security contexts for
	169	* initial SIDs, unlabeled file systems, TCP and UDP port numbers,
	170	* network interfaces, and nodes. This structure stores the
	171	* relevant data for one such entry. Entries of the same kind
	172	* (e.g. all initial SIDs) are linked together into a list.
	173	*/
	174	struct ocontext {
	175	union {
	176	char name; / name of initial SID, fs, netif, fstype, path */
	177	struct {
	178	u8 protocol;
	179	u16 low_port;
	180	u16 high_port;
	181	} port; /* TCP or UDP port information */
	182	struct {
	183	u32 addr;
	184	u32 mask;
	185	} node; /* node information */
	186	struct {
	187	u32 addr[4];
	188	u32 mask[4];
	189	} node6; /* IPv6 node information */
a806f7a1 DJ	190	struct {
	191	u64 subnet_prefix;
	192	u16 low_pkey;
	193	u16 high_pkey;
	194	} ibpkey;
	195	struct {
	196	char *dev_name;
	197	u8 port;
	198	} ibendport;
1da177e4 LT	199	} u;
	200	union {
	201	u32 sclass; /* security class for genfs */
	202	u32 behavior; /* labeling behavior for fs_use */
	203	} v;
	204	struct context context[2]; /* security context(s) */
	205	u32 sid[2]; /* SID(s) */
	206	struct ocontext *next;
	207	};
	208
	209	struct genfs {
	210	char *fstype;
	211	struct ocontext *head;
	212	struct genfs *next;
	213	};
	214
	215	/* symbol table array indices */
	216	#define SYM_COMMONS 0
	217	#define SYM_CLASSES 1
	218	#define SYM_ROLES 2
	219	#define SYM_TYPES 3
	220	#define SYM_USERS 4
	221	#define SYM_BOOLS 5
	222	#define SYM_LEVELS 6
	223	#define SYM_CATS 7
	224	#define SYM_NUM 8
	225
	226	/* object context array indices */
a806f7a1 DJ	227	#define OCON_ISID 0 /* initial SIDs */
	228	#define OCON_FS 1 /* unlabeled file systems */
	229	#define OCON_PORT 2 /* TCP and UDP port numbers */
	230	#define OCON_NETIF 3 /* network interfaces */
	231	#define OCON_NODE 4 /* nodes */
	232	#define OCON_FSUSE 5 /* fs_use */
	233	#define OCON_NODE6 6 /* IPv6 nodes */
	234	#define OCON_IBPKEY 7 /* Infiniband PKeys */
	235	#define OCON_IBENDPORT 8 /* Infiniband end ports */
	236	#define OCON_NUM 9
1da177e4 LT	237
	238	/* The policy database */
	239	struct policydb {
0719aaf5 GT	240	int mls_enabled;
0719aaf5 GT	241
1da177e4 LT	242	/* symbol tables */
	243	struct symtab symtab[SYM_NUM];
	244	#define p_commons symtab[SYM_COMMONS]
	245	#define p_classes symtab[SYM_CLASSES]
	246	#define p_roles symtab[SYM_ROLES]
	247	#define p_types symtab[SYM_TYPES]
	248	#define p_users symtab[SYM_USERS]
	249	#define p_bools symtab[SYM_BOOLS]
	250	#define p_levels symtab[SYM_LEVELS]
	251	#define p_cats symtab[SYM_CATS]
	252
	253	/* symbol names indexed by (value - 1) */
ac76c05b	254	struct flex_array *sym_val_to_name[SYM_NUM];
1da177e4 LT	255
	256	/* class, role, and user attributes indexed by (value - 1) */
	257	struct class_datum **class_val_to_struct;
	258	struct role_datum **role_val_to_struct;
	259	struct user_datum **user_val_to_struct;
23bdecb0	260	struct flex_array *type_val_to_struct_array;
1da177e4 LT	261
	262	/* type enforcement access vectors and transitions */
	263	struct avtab te_avtab;
	264
	265	/* role transitions */
	266	struct role_trans *role_tr;
	267
2463c26d	268	/* file transitions with the last path component */
03a4c018 EP	269	/* quickly exclude lookups when parent ttype has no rules */
03a4c018 EP	270	struct ebitmap filename_trans_ttypes;
2463c26d EP	271	/* actual set of filename_trans rules */
2463c26d EP	272	struct hashtab *filename_trans;
652bb9b0	273
1da177e4 LT	274	/* bools indexed by (value - 1) */
	275	struct cond_bool_datum **bool_val_to_struct;
	276	/* type enforcement conditional access vectors and transitions */
	277	struct avtab te_cond_avtab;
	278	/* linked list indexing te_cond_avtab by conditional */
489a5fd7	279	struct cond_node *cond_list;
1da177e4 LT	280
	281	/* role allows */
	282	struct role_allow *role_allow;
	283
	284	/* security contexts of initial SIDs, unlabeled file systems,
	285	TCP or UDP port numbers, network interfaces and nodes */
	286	struct ocontext *ocontexts[OCON_NUM];
	287
489a5fd7	288	/* security contexts for files in filesystems that cannot support
1da177e4 LT	289	a persistent label mapping or use another
1da177e4 LT	290	fixed labeling behavior. */
489a5fd7	291	struct genfs *genfs;
1da177e4	292
2f3e82d6 SS	293	/* range transitions table (range_trans_key -> mls_range) */
2f3e82d6 SS	294	struct hashtab *range_tr;
1da177e4	295
782ebb99	296	/* type -> attribute reverse mapping */
6371dcd3	297	struct flex_array *type_attr_map_array;
782ebb99	298
3bb56b25 PM	299	struct ebitmap policycaps;
3bb56b25 PM	300
64dbf074 EP	301	struct ebitmap permissive_map;
64dbf074 EP	302
cee74f47 EP	303	/* length of this policy when it was loaded */
	304	size_t len;
	305
1da177e4	306	unsigned int policyvers;
3f12070e EP	307
	308	unsigned int reject_unknown : 1;
	309	unsigned int allow_unknown : 1;
c6d3aaa4 SS	310
	311	u16 process_class;
	312	u32 process_trans_perms;
1da177e4 LT	313	};
	314
	315	extern void policydb_destroy(struct policydb *p);
	316	extern int policydb_load_isids(struct policydb p, struct sidtab s);
	317	extern int policydb_context_isvalid(struct policydb p, struct context c);
45e5421e SS	318	extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
	319	extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
	320	extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
1da177e4	321	extern int policydb_read(struct policydb p, void fp);
cee74f47	322	extern int policydb_write(struct policydb p, void fp);
1da177e4 LT	323
	324	#define PERM_SYMTAB_SIZE 32
	325
	326	#define POLICYDB_CONFIG_MLS 1
	327
3f12070e EP	328	/* the config flags related to unknown classes/perms are bits 2 and 3 */
	329	#define REJECT_UNKNOWN 0x00000002
	330	#define ALLOW_UNKNOWN 0x00000004
	331
1da177e4 LT	332	#define OBJECT_R "object_r"
	333	#define OBJECT_R_VAL 1
	334
	335	#define POLICYDB_MAGIC SELINUX_MAGIC
	336	#define POLICYDB_STRING "SE Linux"
	337
	338	struct policy_file {
	339	char *data;
	340	size_t len;
	341	};
	342
cee74f47 EP	343	struct policy_data {
	344	struct policydb *p;
	345	void *fp;
	346	};
	347
1da177e4 LT	348	static inline int next_entry(void buf, struct policy_file fp, size_t bytes)
	349	{
	350	if (bytes > fp->len)
	351	return -EINVAL;
	352
	353	memcpy(buf, fp->data, bytes);
	354	fp->data += bytes;
	355	fp->len -= bytes;
	356	return 0;
	357	}
	358
652bb9b0	359	static inline int put_entry(const void buf, size_t bytes, int num, struct policy_file fp)
cee74f47 EP	360	{
	361	size_t len = bytes * num;
	362
	363	memcpy(fp->data, buf, len);
	364	fp->data += len;
	365	fp->len -= len;
	366
	367	return 0;
	368	}
	369
ac76c05b EP	370	static inline char sym_name(struct policydb p, unsigned int sym_num, unsigned int element_nr)
	371	{
	372	struct flex_array *fa = p->sym_val_to_name[sym_num];
	373
	374	return flex_array_get_ptr(fa, element_nr);
	375	}
	376
c6d3aaa4 SS	377	extern u16 string_to_security_class(struct policydb p, const char name);
	378	extern u32 string_to_av_perm(struct policydb p, u16 tclass, const char name);
	379
1da177e4 LT	380	#endif /* _SS_POLICYDB_H_ */
1da177e4 LT	381