/* * 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_BUCKETSstruct 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_ */