92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Updated: Yuichi Nakamura <ynakam@hitachisoft.jp>
|
|
* Tuned number of hash slots for avtab to reduce memory usage
|
|
*/
|
|
#ifndef _SS_AVTAB_H_
|
|
#define _SS_AVTAB_H_
|
|
|
|
struct avtab_key {
|
|
u16 source_type; /* source type */
|
|
u16 target_type; /* target type */
|
|
u16 target_class; /* target object class */
|
|
#define AVTAB_ALLOWED 0x0001
|
|
#define AVTAB_AUDITALLOW 0x0002
|
|
#define AVTAB_AUDITDENY 0x0004
|
|
#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
|
|
#define AVTAB_TRANSITION 0x0010
|
|
#define AVTAB_MEMBER 0x0020
|
|
#define AVTAB_CHANGE 0x0040
|
|
#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
|
|
#define AVTAB_ENABLED_OLD 0x80000000 /* reserved for used in cond_avtab */
|
|
#define AVTAB_ENABLED 0x8000 /* reserved for used in cond_avtab */
|
|
u16 specified; /* what field is specified */
|
|
};
|
|
|
|
struct avtab_datum {
|
|
u32 data; /* access vector or type value */
|
|
};
|
|
|
|
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 */
|
|
u32 nslot; /* number of hash slots */
|
|
u16 mask; /* mask to compute hash func */
|
|
|
|
};
|
|
|
|
int avtab_init(struct avtab *);
|
|
int avtab_alloc(struct avtab *, u32);
|
|
struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k);
|
|
void avtab_destroy(struct avtab *h);
|
|
void avtab_hash_eval(struct avtab *h, char *tag);
|
|
|
|
struct policydb;
|
|
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
|
|
int (*insert)(struct avtab *a, struct avtab_key *k,
|
|
struct avtab_datum *d, void *p),
|
|
void *p);
|
|
|
|
int avtab_read(struct avtab *a, void *fp, struct policydb *pol);
|
|
int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp);
|
|
int avtab_write(struct policydb *p, struct avtab *a, void *fp);
|
|
|
|
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);
|
|
|
|
struct avtab_node *avtab_search_node_next(struct avtab_node *node, int specified);
|
|
|
|
void avtab_cache_init(void);
|
|
void avtab_cache_destroy(void);
|
|
|
|
#define MAX_AVTAB_HASH_BITS 11
|
|
#define MAX_AVTAB_HASH_BUCKETS (1 << MAX_AVTAB_HASH_BITS)
|
|
|
|
#endif /* _SS_AVTAB_H_ */
|
|
|