1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* Authors: Karl MacMillan <kmacmillan@tresys.com> 3*4882a593Smuzhiyun * Frank Mayer <mayerf@tresys.com> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright (C) 2003 - 2004 Tresys Technology, LLC 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef _CONDITIONAL_H_ 9*4882a593Smuzhiyun #define _CONDITIONAL_H_ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun #include "avtab.h" 12*4882a593Smuzhiyun #include "symtab.h" 13*4882a593Smuzhiyun #include "policydb.h" 14*4882a593Smuzhiyun #include "../include/conditional.h" 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #define COND_EXPR_MAXDEPTH 10 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /* 19*4882a593Smuzhiyun * A conditional expression is a list of operators and operands 20*4882a593Smuzhiyun * in reverse polish notation. 21*4882a593Smuzhiyun */ 22*4882a593Smuzhiyun struct cond_expr_node { 23*4882a593Smuzhiyun #define COND_BOOL 1 /* plain bool */ 24*4882a593Smuzhiyun #define COND_NOT 2 /* !bool */ 25*4882a593Smuzhiyun #define COND_OR 3 /* bool || bool */ 26*4882a593Smuzhiyun #define COND_AND 4 /* bool && bool */ 27*4882a593Smuzhiyun #define COND_XOR 5 /* bool ^ bool */ 28*4882a593Smuzhiyun #define COND_EQ 6 /* bool == bool */ 29*4882a593Smuzhiyun #define COND_NEQ 7 /* bool != bool */ 30*4882a593Smuzhiyun #define COND_LAST COND_NEQ 31*4882a593Smuzhiyun u32 expr_type; 32*4882a593Smuzhiyun u32 bool; 33*4882a593Smuzhiyun }; 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun struct cond_expr { 36*4882a593Smuzhiyun struct cond_expr_node *nodes; 37*4882a593Smuzhiyun u32 len; 38*4882a593Smuzhiyun }; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* 41*4882a593Smuzhiyun * Each cond_node contains a list of rules to be enabled/disabled 42*4882a593Smuzhiyun * depending on the current value of the conditional expression. This 43*4882a593Smuzhiyun * struct is for that list. 44*4882a593Smuzhiyun */ 45*4882a593Smuzhiyun struct cond_av_list { 46*4882a593Smuzhiyun struct avtab_node **nodes; 47*4882a593Smuzhiyun u32 len; 48*4882a593Smuzhiyun }; 49*4882a593Smuzhiyun 50*4882a593Smuzhiyun /* 51*4882a593Smuzhiyun * A cond node represents a conditional block in a policy. It 52*4882a593Smuzhiyun * contains a conditional expression, the current state of the expression, 53*4882a593Smuzhiyun * two lists of rules to enable/disable depending on the value of the 54*4882a593Smuzhiyun * expression (the true list corresponds to if and the false list corresponds 55*4882a593Smuzhiyun * to else).. 56*4882a593Smuzhiyun */ 57*4882a593Smuzhiyun struct cond_node { 58*4882a593Smuzhiyun int cur_state; 59*4882a593Smuzhiyun struct cond_expr expr; 60*4882a593Smuzhiyun struct cond_av_list true_list; 61*4882a593Smuzhiyun struct cond_av_list false_list; 62*4882a593Smuzhiyun }; 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun void cond_policydb_init(struct policydb *p); 65*4882a593Smuzhiyun void cond_policydb_destroy(struct policydb *p); 66*4882a593Smuzhiyun 67*4882a593Smuzhiyun int cond_init_bool_indexes(struct policydb *p); 68*4882a593Smuzhiyun int cond_destroy_bool(void *key, void *datum, void *p); 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun int cond_index_bool(void *key, void *datum, void *datap); 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun int cond_read_bool(struct policydb *p, struct symtab *s, void *fp); 73*4882a593Smuzhiyun int cond_read_list(struct policydb *p, void *fp); 74*4882a593Smuzhiyun int cond_write_bool(void *key, void *datum, void *ptr); 75*4882a593Smuzhiyun int cond_write_list(struct policydb *p, void *fp); 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun void cond_compute_av(struct avtab *ctab, struct avtab_key *key, 78*4882a593Smuzhiyun struct av_decision *avd, struct extended_perms *xperms); 79*4882a593Smuzhiyun void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key, 80*4882a593Smuzhiyun struct extended_perms_decision *xpermd); 81*4882a593Smuzhiyun void evaluate_cond_nodes(struct policydb *p); 82*4882a593Smuzhiyun void cond_policydb_destroy_dup(struct policydb *p); 83*4882a593Smuzhiyun int cond_policydb_dup(struct policydb *new, struct policydb *orig); 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun #endif /* _CONDITIONAL_H_ */ 86