Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / security / selinux / ss / conditional.h

diff --git a/kernel/security/selinux/ss/conditional.h b/kernel/security/selinux/ss/conditional.h
new file mode 100644 (file)
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+++ b/kernel/security/selinux/ss/conditional.h
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+/* Authors: Karl MacMillan <kmacmillan@tresys.com>
+ *          Frank Mayer <mayerf@tresys.com>
+ *
+ * Copyright (C) 2003 - 2004 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.
+ */
+
+#ifndef _CONDITIONAL_H_
+#define _CONDITIONAL_H_
+
+#include "avtab.h"
+#include "symtab.h"
+#include "policydb.h"
+#include "../include/conditional.h"
+
+#define COND_EXPR_MAXDEPTH 10
+
+/*
+ * A conditional expression is a list of operators and operands
+ * in reverse polish notation.
+ */
+struct cond_expr {
+#define COND_BOOL      1 /* plain bool */
+#define COND_NOT       2 /* !bool */
+#define COND_OR                3 /* bool || bool */
+#define COND_AND       4 /* bool && bool */
+#define COND_XOR       5 /* bool ^ bool */
+#define COND_EQ                6 /* bool == bool */
+#define COND_NEQ       7 /* bool != bool */
+#define COND_LAST      COND_NEQ
+       __u32 expr_type;
+       __u32 bool;
+       struct cond_expr *next;
+};
+
+/*
+ * Each cond_node contains a list of rules to be enabled/disabled
+ * depending on the current value of the conditional expression. This
+ * struct is for that list.
+ */
+struct cond_av_list {
+       struct avtab_node *node;
+       struct cond_av_list *next;
+};
+
+/*
+ * A cond node represents a conditional block in a policy. It
+ * contains a conditional expression, the current state of the expression,
+ * two lists of rules to enable/disable depending on the value of the
+ * expression (the true list corresponds to if and the false list corresponds
+ * to else)..
+ */
+struct cond_node {
+       int cur_state;
+       struct cond_expr *expr;
+       struct cond_av_list *true_list;
+       struct cond_av_list *false_list;
+       struct cond_node *next;
+};
+
+int cond_policydb_init(struct policydb *p);
+void cond_policydb_destroy(struct policydb *p);
+
+int cond_init_bool_indexes(struct policydb *p);
+int cond_destroy_bool(void *key, void *datum, void *p);
+
+int cond_index_bool(void *key, void *datum, void *datap);
+
+int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
+int cond_read_list(struct policydb *p, void *fp);
+int cond_write_bool(void *key, void *datum, void *ptr);
+int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);
+
+void cond_compute_av(struct avtab *ctab, struct avtab_key *key, struct av_decision *avd);
+
+int evaluate_cond_node(struct policydb *p, struct cond_node *node);
+
+#endif /* _CONDITIONAL_H_ */