security/selinux/ss/mls.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Multi-level security (MLS) policy operations.
   4  *
   5  * Author : Stephen Smalley, <sds@tycho.nsa.gov>
   6  */
   7 /*
   8  * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
   9  *
  10  *      Support for enhanced MLS infrastructure.
  11  *
  12  * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
  13  */
  14 /*
  15  * Updated: Hewlett-Packard <paul@paul-moore.com>
  16  *
  17  *      Added support to import/export the MLS label from NetLabel
  18  *
  19  * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
  20  */
  21
  22 #ifndef _SS_MLS_H_
  23 #define _SS_MLS_H_
  24
  25 #include "context.h"
  26 #include "policydb.h"
  27
  28 int mls_compute_context_len(struct context *context);
  29 void mls_sid_to_context(struct context *context, char **scontext);
  30 int mls_context_isvalid(struct policydb *p, struct context *c);
  31 int mls_range_isvalid(struct policydb *p, struct mls_range *r);
  32 int mls_level_isvalid(struct policydb *p, struct mls_level *l);
  33
  34 int mls_context_to_sid(struct policydb *p,
  35                        char oldc,
  36                        char **scontext,
  37                        struct context *context,
  38                        struct sidtab *s,
  39                        u32 def_sid);
  40
  41 int mls_from_string(char *str, struct context *context, gfp_t gfp_mask);
  42
  43 int mls_range_set(struct context *context, struct mls_range *range);
  44
  45 int mls_convert_context(struct policydb *oldp,
  46                         struct policydb *newp,
  47                         struct context *context);
  48
  49 int mls_compute_sid(struct context *scontext,
  50                     struct context *tcontext,
  51                     u16 tclass,
  52                     u32 specified,
  53                     struct context *newcontext,
  54                     bool sock);
  55
  56 int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
  57                          struct context *usercon);
  58
  59 #ifdef CONFIG_NETLABEL
  60 void mls_export_netlbl_lvl(struct context *context,
  61                            struct netlbl_lsm_secattr *secattr);
  62 void mls_import_netlbl_lvl(struct context *context,
  63                            struct netlbl_lsm_secattr *secattr);
  64 int mls_export_netlbl_cat(struct context *context,
  65                           struct netlbl_lsm_secattr *secattr);
  66 int mls_import_netlbl_cat(struct context *context,
  67                           struct netlbl_lsm_secattr *secattr);
  68 #else
  69 static inline void mls_export_netlbl_lvl(struct context *context,
  70                                          struct netlbl_lsm_secattr *secattr)
  71 {
  72         return;
  73 }
  74 static inline void mls_import_netlbl_lvl(struct context *context,
  75                                          struct netlbl_lsm_secattr *secattr)
  76 {
  77         return;
  78 }
  79 static inline int mls_export_netlbl_cat(struct context *context,
  80                                         struct netlbl_lsm_secattr *secattr)
  81 {
  82         return -ENOMEM;
  83 }
  84 static inline int mls_import_netlbl_cat(struct context *context,
  85                                         struct netlbl_lsm_secattr *secattr)
  86 {
  87         return -ENOMEM;
  88 }
  89 #endif
  90
  91 #endif  /* _SS_MLS_H */
  92