1 files changed, 85 insertions, 0 deletions

diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
new file mode 100644
index 000000000000..519d4f6dc655
--- /dev/null
+++ b/security/selinux/ss/avtab.h
@@ -0,0 +1,85 @@
+/*
+ * 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_ */
+