Release 4.11 security/selinux/ss/sidtab.h

/*
 * 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;

#define SIDTAB_CACHE_LEN	3
	
struct sidtab_node *cache[SIDTAB_CACHE_LEN];
	
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);
struct context *sidtab_search_force(struct sidtab *s, u32 sid);

int sidtab_map(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_ */


Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
219
92.41%
1
33.33%
Eric Paris
12
5.06%
1
33.33%
Stephen D. Smalley
6
2.53%
1
33.33%
Total
237
100.00%
3
100.00%
Directory: security/selinux/ss

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