1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Authors: Karl MacMillan <kmacmillan@tresys.com>
3 * Frank Mayer <mayerf@tresys.com>
4 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
7 #ifndef _CONDITIONAL_H_
8 #define _CONDITIONAL_H_
13 #include "../include/conditional.h"
15 #define COND_EXPR_MAXDEPTH 10
18 * A conditional expression is a list of operators and operands
19 * in reverse polish notation.
21 struct cond_expr_node {
22 #define COND_BOOL 1 /* plain bool */
23 #define COND_NOT 2 /* !bool */
24 #define COND_OR 3 /* bool || bool */
25 #define COND_AND 4 /* bool && bool */
26 #define COND_XOR 5 /* bool ^ bool */
27 #define COND_EQ 6 /* bool == bool */
28 #define COND_NEQ 7 /* bool != bool */
29 #define COND_LAST COND_NEQ
35 struct cond_expr_node *nodes;
40 * Each cond_node contains a list of rules to be enabled/disabled
41 * depending on the current value of the conditional expression. This
42 * struct is for that list.
45 struct avtab_node **nodes;
50 * A cond node represents a conditional block in a policy. It
51 * contains a conditional expression, the current state of the expression,
52 * two lists of rules to enable/disable depending on the value of the
53 * expression (the true list corresponds to if and the false list corresponds
58 struct cond_expr expr;
59 struct cond_av_list true_list;
60 struct cond_av_list false_list;
63 void cond_policydb_init(struct policydb *p);
64 void cond_policydb_destroy(struct policydb *p);
66 int cond_init_bool_indexes(struct policydb *p);
67 int cond_destroy_bool(void *key, void *datum, void *p);
69 int cond_index_bool(void *key, void *datum, void *datap);
71 int cond_read_bool(struct policydb *p, struct symtab *s, void *fp);
72 int cond_read_list(struct policydb *p, void *fp);
73 int cond_write_bool(void *key, void *datum, void *ptr);
74 int cond_write_list(struct policydb *p, void *fp);
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);
80 void evaluate_cond_nodes(struct policydb *p);
81 void cond_policydb_destroy_dup(struct policydb *p);
82 int cond_policydb_dup(struct policydb *new, struct policydb *orig);
84 #endif /* _CONDITIONAL_H_ */