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 *
>> 5 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
5 */ 6 */
6 7
7 #ifndef _CONDITIONAL_H_ 8 #ifndef _CONDITIONAL_H_
8 #define _CONDITIONAL_H_ 9 #define _CONDITIONAL_H_
9 10
10 #include "avtab.h" 11 #include "avtab.h"
11 #include "symtab.h" 12 #include "symtab.h"
12 #include "policydb.h" 13 #include "policydb.h"
13 #include "../include/conditional.h" 14 #include "../include/conditional.h"
14 15
15 #define COND_EXPR_MAXDEPTH 10 16 #define COND_EXPR_MAXDEPTH 10
16 17
17 /* 18 /*
18 * A conditional expression is a list of opera 19 * A conditional expression is a list of operators and operands
19 * in reverse polish notation. 20 * in reverse polish notation.
20 */ 21 */
21 struct cond_expr_node { 22 struct cond_expr_node {
22 #define COND_BOOL 1 /* plain bool */ !! 23 #define COND_BOOL 1 /* plain bool */
23 #define COND_NOT 2 /* !bool */ !! 24 #define COND_NOT 2 /* !bool */
24 #define COND_OR 3 /* bool || bool */ !! 25 #define COND_OR 3 /* bool || bool */
25 #define COND_AND 4 /* bool && bool */ !! 26 #define COND_AND 4 /* bool && bool */
26 #define COND_XOR 5 /* bool ^ bool */ !! 27 #define COND_XOR 5 /* bool ^ bool */
27 #define COND_EQ 6 /* bool == bool */ !! 28 #define COND_EQ 6 /* bool == bool */
28 #define COND_NEQ 7 /* bool != bool */ !! 29 #define COND_NEQ 7 /* bool != bool */
29 #define COND_LAST COND_NEQ !! 30 #define COND_LAST COND_NEQ
30 u32 expr_type; 31 u32 expr_type;
31 u32 boolean; 32 u32 boolean;
32 }; 33 };
33 34
34 struct cond_expr { 35 struct cond_expr {
35 struct cond_expr_node *nodes; 36 struct cond_expr_node *nodes;
36 u32 len; 37 u32 len;
37 }; 38 };
38 39
39 /* 40 /*
40 * Each cond_node contains a list of rules to 41 * Each cond_node contains a list of rules to be enabled/disabled
41 * depending on the current value of the condi 42 * depending on the current value of the conditional expression. This
42 * struct is for that list. 43 * struct is for that list.
43 */ 44 */
44 struct cond_av_list { 45 struct cond_av_list {
45 struct avtab_node **nodes; 46 struct avtab_node **nodes;
46 u32 len; 47 u32 len;
47 }; 48 };
48 49
49 /* 50 /*
50 * A cond node represents a conditional block 51 * A cond node represents a conditional block in a policy. It
51 * contains a conditional expression, the curr 52 * contains a conditional expression, the current state of the expression,
52 * two lists of rules to enable/disable depend 53 * two lists of rules to enable/disable depending on the value of the
53 * expression (the true list corresponds to if 54 * expression (the true list corresponds to if and the false list corresponds
54 * to else).. 55 * to else)..
55 */ 56 */
56 struct cond_node { 57 struct cond_node {
57 int cur_state; 58 int cur_state;
58 struct cond_expr expr; 59 struct cond_expr expr;
59 struct cond_av_list true_list; 60 struct cond_av_list true_list;
60 struct cond_av_list false_list; 61 struct cond_av_list false_list;
61 }; 62 };
62 63
63 void cond_policydb_init(struct policydb *p); 64 void cond_policydb_init(struct policydb *p);
64 void cond_policydb_destroy(struct policydb *p) 65 void cond_policydb_destroy(struct policydb *p);
65 66
66 int cond_init_bool_indexes(struct policydb *p) 67 int cond_init_bool_indexes(struct policydb *p);
67 int cond_destroy_bool(void *key, void *datum, 68 int cond_destroy_bool(void *key, void *datum, void *p);
68 69
69 int cond_index_bool(void *key, void *datum, vo 70 int cond_index_bool(void *key, void *datum, void *datap);
70 71
71 int cond_read_bool(struct policydb *p, struct 72 int cond_read_bool(struct policydb *p, struct symtab *s, void *fp);
72 int cond_read_list(struct policydb *p, void *f 73 int cond_read_list(struct policydb *p, void *fp);
73 int cond_write_bool(void *key, void *datum, vo 74 int cond_write_bool(void *key, void *datum, void *ptr);
74 int cond_write_list(struct policydb *p, void * 75 int cond_write_list(struct policydb *p, void *fp);
75 76
76 void cond_compute_av(struct avtab *ctab, struc 77 void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
77 struct av_decision *avd, !! 78 struct av_decision *avd, struct extended_perms *xperms);
78 void cond_compute_xperms(struct avtab *ctab, s 79 void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
79 struct extended_perms !! 80 struct extended_perms_decision *xpermd);
80 void evaluate_cond_nodes(struct policydb *p); 81 void evaluate_cond_nodes(struct policydb *p);
81 void cond_policydb_destroy_dup(struct policydb 82 void cond_policydb_destroy_dup(struct policydb *p);
82 int cond_policydb_dup(struct policydb *new, co !! 83 int cond_policydb_dup(struct policydb *new, struct policydb *orig);
83 84
84 #endif /* _CONDITIONAL_H_ */ 85 #endif /* _CONDITIONAL_H_ */
85 86
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