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

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * A security identifier table (sidtab) is a hash table
 4 * of security context structures indexed by SID value.
 5 *
 6 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
 7 */
 8#ifndef _SS_SIDTAB_H_
 9#define _SS_SIDTAB_H_
10
11#include "context.h"
12
13struct sidtab_node {
14	u32 sid;		/* security identifier */
15	struct context context;	/* security context structure */
16	struct sidtab_node *next;
17};
18
19#define SIDTAB_HASH_BITS 7
20#define SIDTAB_HASH_BUCKETS (1 << SIDTAB_HASH_BITS)
21#define SIDTAB_HASH_MASK (SIDTAB_HASH_BUCKETS-1)
22
23#define SIDTAB_SIZE SIDTAB_HASH_BUCKETS
24
25struct sidtab {
26	struct sidtab_node **htable;
27	unsigned int nel;	/* number of elements */
28	unsigned int next_sid;	/* next SID to allocate */
29	unsigned char shutdown;
30#define SIDTAB_CACHE_LEN	3
31	struct sidtab_node *cache[SIDTAB_CACHE_LEN];
32	spinlock_t lock;
33};
34
35int sidtab_init(struct sidtab *s);
36int sidtab_insert(struct sidtab *s, u32 sid, struct context *context);
37struct context *sidtab_search(struct sidtab *s, u32 sid);
38struct context *sidtab_search_force(struct sidtab *s, u32 sid);
39
40int sidtab_map(struct sidtab *s,
41	       int (*apply) (u32 sid,
42			     struct context *context,
43			     void *args),
44	       void *args);
45
46int sidtab_context_to_sid(struct sidtab *s,
47			  struct context *context,
48			  u32 *sid);
49
50void sidtab_hash_eval(struct sidtab *h, char *tag);
51void sidtab_destroy(struct sidtab *s);
52void sidtab_set(struct sidtab *dst, struct sidtab *src);
53void sidtab_shutdown(struct sidtab *s);
54
55#endif	/* _SS_SIDTAB_H_ */
56
57