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/* 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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