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-rw-r--r--security/selinux/ss/avtab.h85
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diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
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+/*
+ * An access vector table (avtab) is a hash table
+ * of access vectors and transition types indexed
+ * by a type pair and a class. An access vector
+ * table is used to represent the type enforcement
+ * tables.
+ *
+ * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
+ */
+
+/* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
+ *
+ * Added conditional policy language extensions
+ *
+ * Copyright (C) 2003 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 _SS_AVTAB_H_
+#define _SS_AVTAB_H_
+
+struct avtab_key {
+ u32 source_type; /* source type */
+ u32 target_type; /* target type */
+ u32 target_class; /* target object class */
+};
+
+struct avtab_datum {
+#define AVTAB_ALLOWED 1
+#define AVTAB_AUDITALLOW 2
+#define AVTAB_AUDITDENY 4
+#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
+#define AVTAB_TRANSITION 16
+#define AVTAB_MEMBER 32
+#define AVTAB_CHANGE 64
+#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
+#define AVTAB_ENABLED 0x80000000 /* reserved for used in cond_avtab */
+ u32 specified; /* what fields are specified */
+ u32 data[3]; /* access vectors or types */
+#define avtab_allowed(x) (x)->data[0]
+#define avtab_auditdeny(x) (x)->data[1]
+#define avtab_auditallow(x) (x)->data[2]
+#define avtab_transition(x) (x)->data[0]
+#define avtab_change(x) (x)->data[1]
+#define avtab_member(x) (x)->data[2]
+};
+
+struct avtab_node {
+ struct avtab_key key;
+ struct avtab_datum datum;
+ struct avtab_node *next;
+};
+
+struct avtab {
+ struct avtab_node **htable;
+ u32 nel; /* number of elements */
+};
+
+int avtab_init(struct avtab *);
+struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k, int specified);
+void avtab_destroy(struct avtab *h);
+void avtab_hash_eval(struct avtab *h, char *tag);
+
+int avtab_read_item(void *fp, struct avtab_datum *avdatum, struct avtab_key *avkey);
+int avtab_read(struct avtab *a, void *fp, u32 config);
+
+struct avtab_node *avtab_insert_nonunique(struct avtab *h, struct avtab_key *key,
+ struct avtab_datum *datum);
+
+struct avtab_node *avtab_search_node(struct avtab *h, struct avtab_key *key, int specified);
+
+struct avtab_node *avtab_search_node_next(struct avtab_node *node, int specified);
+
+void avtab_cache_init(void);
+void avtab_cache_destroy(void);
+
+#define AVTAB_HASH_BITS 15
+#define AVTAB_HASH_BUCKETS (1 << AVTAB_HASH_BITS)
+#define AVTAB_HASH_MASK (AVTAB_HASH_BUCKETS-1)
+
+#define AVTAB_SIZE AVTAB_HASH_BUCKETS
+
+#endif /* _SS_AVTAB_H_ */
+