/* SPDX-License-Identifier: GPL-2.0 */
/*
* Multi - level security ( MLS ) policy operations .
*
* Author : Stephen Smalley , < stephen . smalley . work @ gmail . com >
*/
/*
* Updated : Trusted Computer Solutions , Inc . < dgoeddel @ trustedcs . com >
* Support for enhanced MLS infrastructure .
* Copyright ( C ) 2004 - 2006 Trusted Computer Solutions , Inc .
*
* Updated : Hewlett - Packard < paul @ paul - moore . com >
* Added support to import / export the MLS label from NetLabel
* Copyright ( X ) Hewlett - Packard Development Company , L . P . , 2006
*/
#ifndef _SS_MLS_H_
#define _SS_MLS_H_
#include <linux/jhash.h>
#include "context.h"
#include "ebitmap.h"
#include "policydb.h"
int mls_compute_context_len(struct policydb *p, struct context *context);
void mls_sid_to_context(struct policydb *p, struct context *context,
char **scontext);
int mls_context_isvalid(struct policydb *p, struct context *c);
int mls_range_isvalid(struct policydb *p, struct mls_range *r);
int mls_level_isvalid(struct policydb *p, struct mls_level *l);
int mls_context_to_sid(struct policydb *p, char oldc, char *scontext,
struct context *context, struct sidtab *s, u32 def_sid);
int mls_from_string(struct policydb *p, char *str, struct context *context,
gfp_t gfp_mask);
int mls_range_set(struct context *context, struct mls_range *range);
int mls_convert_context(struct policydb *oldp, struct policydb *newp,
struct context *oldc, struct context *newc);
int mls_compute_sid(struct policydb *p, struct context *scontext,
struct context *tcontext, u16 tclass, u32 specified,
struct context *newcontext, bool sock);
int mls_setup_user_range(struct policydb *p, struct context *fromcon,
struct user_datum *user, struct context *usercon);
#ifdef CONFIG_NETLABEL
void mls_export_netlbl_lvl(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr);
void mls_import_netlbl_lvl(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr);
int mls_export_netlbl_cat(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr);
int mls_import_netlbl_cat(struct policydb *p, struct context *context,
struct netlbl_lsm_secattr *secattr);
#else
static inline void mls_export_netlbl_lvl(struct policydb *p,
struct context *context,
struct netlbl_lsm_secattr *secattr)
{
return ;
}
static inline void mls_import_netlbl_lvl(struct policydb *p,
struct context *context,
struct netlbl_lsm_secattr *secattr)
{
return ;
}
static inline int mls_export_netlbl_cat(struct policydb *p,
struct context *context,
struct netlbl_lsm_secattr *secattr)
{
return -ENOMEM;
}
static inline int mls_import_netlbl_cat(struct policydb *p,
struct context *context,
struct netlbl_lsm_secattr *secattr)
{
return -ENOMEM;
}
#endif
static inline u32 mls_range_hash(const struct mls_range *r, u32 hash)
{
hash = jhash_2words(r->level[0 ].sens, r->level[1 ].sens, hash);
hash = ebitmap_hash(&r->level[0 ].cat, hash);
hash = ebitmap_hash(&r->level[1 ].cat, hash);
return hash;
}
#endif /* _SS_MLS_H */
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(vorverarbeitet am 2026-09-27)
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