1 /* SPDX-License-Identifier: GPL-2.0-only */ 1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Authors: Karl MacMillan <kmacmillan@tresys. 2 /* Authors: Karl MacMillan <kmacmillan@tresys.com>
3 * Frank Mayer <mayerf@tresys.com> 3 * Frank Mayer <mayerf@tresys.com>
4 * Copyright (C) 2003 - 2004 Tresys T 4 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
5 */ 5 */
6 6
7 #ifndef _CONDITIONAL_H_ 7 #ifndef _CONDITIONAL_H_
8 #define _CONDITIONAL_H_ 8 #define _CONDITIONAL_H_
9 9
10 #include "avtab.h" 10 #include "avtab.h"
11 #include "symtab.h" 11 #include "symtab.h"
12 #include "policydb.h" 12 #include "policydb.h"
13 #include "../include/conditional.h" 13 #include "../include/conditional.h"
14 14
15 #define COND_EXPR_MAXDEPTH 10 15 #define COND_EXPR_MAXDEPTH 10
16 16
17 /* 17 /*
18 * A conditional expression is a list of opera 18 * A conditional expression is a list of operators and operands
19 * in reverse polish notation. 19 * in reverse polish notation.
20 */ 20 */
21 struct cond_expr_node { 21 struct cond_expr_node {
22 #define COND_BOOL 1 /* plain bool */ 22 #define COND_BOOL 1 /* plain bool */
23 #define COND_NOT 2 /* !bool */ 23 #define COND_NOT 2 /* !bool */
24 #define COND_OR 3 /* bool || bool */ 24 #define COND_OR 3 /* bool || bool */
25 #define COND_AND 4 /* bool && bool */ 25 #define COND_AND 4 /* bool && bool */
26 #define COND_XOR 5 /* bool ^ bool */ 26 #define COND_XOR 5 /* bool ^ bool */
27 #define COND_EQ 6 /* bool == bool */ 27 #define COND_EQ 6 /* bool == bool */
28 #define COND_NEQ 7 /* bool != bool */ 28 #define COND_NEQ 7 /* bool != bool */
29 #define COND_LAST COND_NEQ 29 #define COND_LAST COND_NEQ
30 u32 expr_type; 30 u32 expr_type;
31 u32 boolean; 31 u32 boolean;
32 }; 32 };
33 33
34 struct cond_expr { 34 struct cond_expr {
35 struct cond_expr_node *nodes; 35 struct cond_expr_node *nodes;
36 u32 len; 36 u32 len;
37 }; 37 };
38 38
39 /* 39 /*
40 * Each cond_node contains a list of rules to 40 * Each cond_node contains a list of rules to be enabled/disabled
41 * depending on the current value of the condi 41 * depending on the current value of the conditional expression. This
42 * struct is for that list. 42 * struct is for that list.
43 */ 43 */
44 struct cond_av_list { 44 struct cond_av_list {
45 struct avtab_node **nodes; 45 struct avtab_node **nodes;
46 u32 len; 46 u32 len;
47 }; 47 };
48 48
49 /* 49 /*
50 * A cond node represents a conditional block 50 * A cond node represents a conditional block in a policy. It
51 * contains a conditional expression, the curr 51 * contains a conditional expression, the current state of the expression,
52 * two lists of rules to enable/disable depend 52 * two lists of rules to enable/disable depending on the value of the
53 * expression (the true list corresponds to if 53 * expression (the true list corresponds to if and the false list corresponds
54 * to else).. 54 * to else)..
55 */ 55 */
56 struct cond_node { 56 struct cond_node {
57 int cur_state; 57 int cur_state;
58 struct cond_expr expr; 58 struct cond_expr expr;
59 struct cond_av_list true_list; 59 struct cond_av_list true_list;
60 struct cond_av_list false_list; 60 struct cond_av_list false_list;
61 }; 61 };
62 62
63 void cond_policydb_init(struct policydb *p); 63 void cond_policydb_init(struct policydb *p);
64 void cond_policydb_destroy(struct policydb *p) 64 void cond_policydb_destroy(struct policydb *p);
65 65
66 int cond_init_bool_indexes(struct policydb *p) 66 int cond_init_bool_indexes(struct policydb *p);
67 int cond_destroy_bool(void *key, void *datum, 67 int cond_destroy_bool(void *key, void *datum, void *p);
68 68
69 int cond_index_bool(void *key, void *datum, vo 69 int cond_index_bool(void *key, void *datum, void *datap);
70 70
71 int cond_read_bool(struct policydb *p, struct 71 int cond_read_bool(struct policydb *p, struct symtab *s, void *fp);
72 int cond_read_list(struct policydb *p, void *f 72 int cond_read_list(struct policydb *p, void *fp);
73 int cond_write_bool(void *key, void *datum, vo 73 int cond_write_bool(void *key, void *datum, void *ptr);
74 int cond_write_list(struct policydb *p, void * 74 int cond_write_list(struct policydb *p, void *fp);
75 75
76 void cond_compute_av(struct avtab *ctab, struc 76 void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
77 struct av_decision *avd, 77 struct av_decision *avd, struct extended_perms *xperms);
78 void cond_compute_xperms(struct avtab *ctab, s 78 void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
79 struct extended_perms 79 struct extended_perms_decision *xpermd);
80 void evaluate_cond_nodes(struct policydb *p); 80 void evaluate_cond_nodes(struct policydb *p);
81 void cond_policydb_destroy_dup(struct policydb 81 void cond_policydb_destroy_dup(struct policydb *p);
82 int cond_policydb_dup(struct policydb *new, co 82 int cond_policydb_dup(struct policydb *new, const struct policydb *orig);
83 83
84 #endif /* _CONDITIONAL_H_ */ 84 #endif /* _CONDITIONAL_H_ */
85 85
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