/* * An access vector table (avtab) is a hash table * of access vectors and transition types indexed * by a type pair and a class.  An access vector * table is used to represent the type enforcement * tables. * *  Author : Stephen Smalley, <sds@epoch.ncsc.mil> *//* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> * * 	Added conditional policy language extensions * * Copyright (C) 2003 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_AVTAB_H_#define _SS_AVTAB_H_struct avtab_key {	u32 source_type;	/* source type */	u32 target_type;	/* target type */	u32 target_class;	/* target object class */};struct avtab_datum {#define AVTAB_ALLOWED     1#define AVTAB_AUDITALLOW  2#define AVTAB_AUDITDENY   4#define AVTAB_AV         (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)#define AVTAB_TRANSITION 16#define AVTAB_MEMBER     32#define AVTAB_CHANGE     64#define AVTAB_TYPE       (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)#define AVTAB_ENABLED    0x80000000 /* reserved for used in cond_avtab */	u32 specified;	/* what fields are specified */	u32 data[3];	/* access vectors or types */#define avtab_allowed(x) (x)->data[0]#define avtab_auditdeny(x) (x)->data[1]#define avtab_auditallow(x) (x)->data[2]#define avtab_transition(x) (x)->data[0]#define avtab_change(x) (x)->data[1]#define avtab_member(x) (x)->data[2]};struct avtab_node {	struct avtab_key key;	struct avtab_datum datum;	struct avtab_node *next;};struct avtab {	struct avtab_node **htable;	u32 nel;	/* number of elements */};int avtab_init(struct avtab *);int avtab_insert(struct avtab *h, struct avtab_key *k, struct avtab_datum *d);struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k, int specified);void avtab_destroy(struct avtab *h);int avtab_map(struct avtab *h,	      int (*apply) (struct avtab_key *k,			    struct avtab_datum *d,			    void *args),	      void *args);void avtab_hash_eval(struct avtab *h, char *tag);int avtab_read_item(void *fp, struct avtab_datum *avdatum, struct avtab_key *avkey);int avtab_read(struct avtab *a, void *fp, u32 config);struct avtab_node *avtab_insert_nonunique(struct avtab *h, struct avtab_key *key,					  struct avtab_datum *datum);struct avtab_node *avtab_search_node(struct avtab *h, struct avtab_key *key, int specified);struct avtab_node *avtab_search_node_next(struct avtab_node *node, int specified);#define AVTAB_HASH_BITS 15#define AVTAB_HASH_BUCKETS (1 << AVTAB_HASH_BITS)#define AVTAB_HASH_MASK (AVTAB_HASH_BUCKETS-1)#define AVTAB_SIZE AVTAB_HASH_BUCKETS#endif	/* _SS_AVTAB_H_ */