1 /*
2  * A security identifier table (sidtab) is a hash table
3  * of security context structures indexed by SID value.
4  */
5 #ifndef _SELINUX_AVC_SIDTAB_H_
6 #define _SELINUX_AVC_SIDTAB_H_
7 
8 #include <selinux/selinux.h>
9 #include <selinux/avc.h>
10 #include "dso.h"
11 
12 struct sidtab_node {
13 	struct security_id sid_s;
14 	struct sidtab_node *next;
15 };
16 
17 #define SIDTAB_HASH_BITS 7
18 #define SIDTAB_HASH_BUCKETS (1 << SIDTAB_HASH_BITS)
19 #define SIDTAB_HASH_MASK (SIDTAB_HASH_BUCKETS-1)
20 #define SIDTAB_SIZE SIDTAB_HASH_BUCKETS
21 
22 struct sidtab {
23 	struct sidtab_node **htable;
24 	unsigned nel;
25 };
26 
27 int sidtab_init(struct sidtab *s) hidden;
28 int sidtab_insert(struct sidtab *s, const char * ctx) hidden;
29 
30 int sidtab_context_to_sid(struct sidtab *s,
31 			  const char * ctx, security_id_t * sid) hidden;
32 
33 void sidtab_sid_stats(struct sidtab *s, char *buf, int buflen) hidden;
34 void sidtab_destroy(struct sidtab *s) hidden;
35 
36 #endif				/* _SELINUX_AVC_SIDTAB_H_ */
37