1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* A security identifier table (sidtab) is a hash table
* of security context structures indexed by SID value.
*
* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
*/
#ifndef _SS_SIDTAB_H_
#define _SS_SIDTAB_H_
#include "context.h"
struct sidtab_node {
u32 sid; /* security identifier */
struct context context; /* security context structure */
struct sidtab_node *next;
};
#define SIDTAB_HASH_BITS 7
#define SIDTAB_HASH_BUCKETS (1 << SIDTAB_HASH_BITS)
#define SIDTAB_HASH_MASK (SIDTAB_HASH_BUCKETS-1)
#define SIDTAB_SIZE SIDTAB_HASH_BUCKETS
struct sidtab {
struct sidtab_node **htable;
unsigned int nel; /* number of elements */
unsigned int next_sid; /* next SID to allocate */
unsigned char shutdown;
spinlock_t lock;
};
int sidtab_init(struct sidtab *s);
int sidtab_insert(struct sidtab *s, u32 sid, struct context *context);
struct context *sidtab_search(struct sidtab *s, u32 sid);
int sidtab_map(struct sidtab *s,
int (*apply) (u32 sid,
struct context *context,
void *args),
void *args);
void sidtab_map_remove_on_error(struct sidtab *s,
int (*apply) (u32 sid,
struct context *context,
void *args),
void *args);
int sidtab_context_to_sid(struct sidtab *s,
struct context *context,
u32 *sid);
void sidtab_hash_eval(struct sidtab *h, char *tag);
void sidtab_destroy(struct sidtab *s);
void sidtab_set(struct sidtab *dst, struct sidtab *src);
void sidtab_shutdown(struct sidtab *s);
#endif /* _SS_SIDTAB_H_ */
|
