[GitHub/mt8127/android_kernel_alcatel_ttab.git] / security / selinux / ss / conditional.h

/* Authors: Karl MacMillan <kmacmillan@tresys.com>
 *          Frank Mayer <mayerf@tresys.com>
 *
 * 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 _CONDITIONAL_H_
#define _CONDITIONAL_H_

#include "avtab.h"
#include "symtab.h"
#include "policydb.h"
#include "../include/conditional.h"

#define COND_EXPR_MAXDEPTH 10

/*
 * A conditional expression is a list of operators and operands
 * in reverse polish notation.
 */
struct cond_expr {
#define COND_BOOL	1 /* plain bool */
#define COND_NOT	2 /* !bool */
#define COND_OR		3 /* bool || bool */
#define COND_AND	4 /* bool && bool */
#define COND_XOR	5 /* bool ^ bool */
#define COND_EQ		6 /* bool == bool */
#define COND_NEQ	7 /* bool != bool */
#define COND_LAST	COND_NEQ
	__u32 expr_type;
	__u32 bool;
	struct cond_expr *next;
};

/*
 * Each cond_node contains a list of rules to be enabled/disabled
 * depending on the current value of the conditional expression. This
 * struct is for that list.
 */
struct cond_av_list {
	struct avtab_node *node;
	struct cond_av_list *next;
};

/*
 * A cond node represents a conditional block in a policy. It
 * contains a conditional expression, the current state of the expression,
 * two lists of rules to enable/disable depending on the value of the
 * expression (the true list corresponds to if and the false list corresponds
 * to else)..
 */
struct cond_node {
	int cur_state;
	struct cond_expr *expr;
	struct cond_av_list *true_list;
	struct cond_av_list *false_list;
	struct cond_node *next;
};

int cond_policydb_init(struct policydb *p);
void cond_policydb_destroy(struct policydb *p);

int cond_init_bool_indexes(struct policydb *p);
int cond_destroy_bool(void *key, void *datum, void *p);

int cond_index_bool(void *key, void *datum, void *datap);

int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
int cond_read_list(struct policydb *p, void *fp);
int cond_write_bool(void *key, void *datum, void *ptr);
int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);

void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
		struct av_decision *avd, struct extended_perms *xperms);
void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
		struct extended_perms_decision *xpermd);
int evaluate_cond_node(struct policydb *p, struct cond_node *node);

#endif /* _CONDITIONAL_H_ */
Commit	Line	Data
1da177e4 LT	1	/* Authors: Karl MacMillan <kmacmillan@tresys.com>
	2	* Frank Mayer <mayerf@tresys.com>
	3	*
	4	* Copyright (C) 2003 - 2004 Tresys Technology, LLC
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation, version 2.
	8	*/
	9
	10	#ifndef _CONDITIONAL_H_
	11	#define _CONDITIONAL_H_
	12
	13	#include "avtab.h"
	14	#include "symtab.h"
	15	#include "policydb.h"
7b98a585	16	#include "../include/conditional.h"
1da177e4 LT	17
	18	#define COND_EXPR_MAXDEPTH 10
	19
	20	/*
	21	* A conditional expression is a list of operators and operands
	22	* in reverse polish notation.
	23	*/
	24	struct cond_expr {
	25	#define COND_BOOL 1 /* plain bool */
	26	#define COND_NOT 2 /* !bool */
	27	#define COND_OR 3 /* bool \|\| bool */
	28	#define COND_AND 4 /* bool && bool */
	29	#define COND_XOR 5 /* bool ^ bool */
	30	#define COND_EQ 6 /* bool == bool */
	31	#define COND_NEQ 7 /* bool != bool */
421fae06	32	#define COND_LAST COND_NEQ
1da177e4 LT	33	__u32 expr_type;
	34	__u32 bool;
	35	struct cond_expr *next;
	36	};
	37
	38	/*
	39	* Each cond_node contains a list of rules to be enabled/disabled
	40	* depending on the current value of the conditional expression. This
	41	* struct is for that list.
	42	*/
	43	struct cond_av_list {
	44	struct avtab_node *node;
	45	struct cond_av_list *next;
	46	};
	47
	48	/*
	49	* A cond node represents a conditional block in a policy. It
	50	* contains a conditional expression, the current state of the expression,
	51	* two lists of rules to enable/disable depending on the value of the
	52	* expression (the true list corresponds to if and the false list corresponds
	53	* to else)..
	54	*/
	55	struct cond_node {
	56	int cur_state;
	57	struct cond_expr *expr;
	58	struct cond_av_list *true_list;
	59	struct cond_av_list *false_list;
	60	struct cond_node *next;
	61	};
	62
ccb3cbeb EP	63	int cond_policydb_init(struct policydb *p);
ccb3cbeb EP	64	void cond_policydb_destroy(struct policydb *p);
1da177e4	65
ccb3cbeb	66	int cond_init_bool_indexes(struct policydb *p);
1da177e4 LT	67	int cond_destroy_bool(void key, void datum, void *p);
	68
	69	int cond_index_bool(void key, void datum, void *datap);
	70
	71	int cond_read_bool(struct policydb p, struct hashtab h, void *fp);
	72	int cond_read_list(struct policydb p, void fp);
cee74f47 EP	73	int cond_write_bool(void key, void datum, void *ptr);
cee74f47 EP	74	int cond_write_list(struct policydb p, struct cond_node list, void *fp);
1da177e4	75
949c2c1d S	76	void cond_compute_av(struct avtab ctab, struct avtab_key key,
	77	struct av_decision avd, struct extended_perms xperms);
	78	void cond_compute_xperms(struct avtab ctab, struct avtab_key key,
	79	struct extended_perms_decision *xpermd);
1da177e4 LT	80	int evaluate_cond_node(struct policydb p, struct cond_node node);
	81
	82	#endif /* _CONDITIONAL_H_ */